STU48 (Setouchi48) is a
Japanese idol
An is a type of entertainer marketed for image, attractiveness, and personality in Japanese popular culture, Japanese pop culture. Idols are primarily singers with training in other performance skills such as acting, dancing, and modeling. Idol ...
group and sister group of
AKB48
AKB48 (pronounced ''A.K.B. Forty-Eight'') is a Japanese idol musical girl group named after the Akihabara area in Tokyo, where the group's theater is located. AKB48 has sold more records than any other female musical act in Japanese history. AK ...
named after the
Setouchi Region
The , or simply Setouchi, is a geographic region of Japan. Setouchi includes the Seto Inland Sea and the adjacent coastal areas of Honshū, Shikoku, and Kyūshū, three of the four main islands of Japan.
Yamaguchi, Hiroshima, Okayama, Hyōg ...
. The group had a from 2019 to 2021. It is co-owned by the tourism board of Setouchi Region and is highly involved in their promotional efforts. The group's captain is Azumi Okada and the vice captain is Akari Fukuda.
History
2016–2017: Foundation
The formation of STU48 was announced in October 2016. The application period for new members was open from January to February 5, 2017. AKB48 members
Mayu Watanabe
is a Japanese former singer and actress. Watanabe started her career as a member of the idol girl group AKB48 under Team B. In the annual AKB48 General Elections event, she had consistently been voted by fans to rank among the group's top membe ...
and
Yuki Kashiwagi
is a Japanese singer. She was a member of the Japanese idol girl group AKB48, NMB48 and NGT48. She auditioned for AKB48 on December 3, 2006, and was a member of AKB48's Team B. She was previously the captain of Team B before she was replaced ...
visited the governments of seven Setouchi prefectures (Hiroshima, Yamaguchi, Ehime, Hyogo, Okayama, Tokushima and Kagawa) between them to promote the auditions. On February 22, it was announced that
Nana Okada
is a Japanese singer-songwriter and actor, represented by Avex Asunaro. She is a former member of the girl groups AKB48 and STU48. She was a fixture on AKB48's major single lineups from 2016 to 2022 and is considered one of the best singers t ...
of AKB48 and
Rino Sashihara
is a Japanese tarento, singer, producer and actress. She is best known as a former member of idol groups HKT48, AKB48 and STU48, and was the theater manager for HKT48 and STU48. She was also a member of AKB48's unit Not Yet and is the produc ...
of
HKT48
HKT48 (read "H.K.T. Forty-eight") is a Japanese idol group produced by Yasushi Akimoto. HKT48 is named after the Hakata-ku, Fukuoka, Hakata-ku ward of Fukuoka, where Akimoto originally intended to base the group. The group currently performs at ...
would be concurrent members of STU48 and respectively hold the positions of captain and theater manager. On March 19, 44 applicants who passed the auditions to become first generation members were introduced, and STU48's first generation was formed with 31 members on March 31.
In April, Setouchi Destination Marketing Organization (DMO), the tourism board of Setouchi Region, announced their support of STU48 in the forms of capital investment, business development support, and assistance in coordinating with local governments.

STU48 made their debut performance on May 3 at the
Hiroshima Peace Memorial Park
is a memorial park in the center of Hiroshima, Japan. It is dedicated to the legacy of Hiroshima as the first city in the world to suffer a Atomic bombings of Hiroshima and Nagasaki, nuclear attack at the end of World War II, and to the memories ...
as part of the 2017
Hiroshima Flower Festival
The is a flower festival held annually in Hiroshima, Japan.
Overview
The Hiroshima Flower Festival has been held every year since 1977 during Golden Week, from 3 May to 5 May.
More than one million people take part in the festival each year.
...
. Their first independent live show was on June 3 at the Okayama Mirai Hall. Their first music video, "Setouchi no Koe", was also released in June, and the song was included in the AKB48 single "
Negaigoto no Mochigusare".
They also participated in the AKB48 single "
11gatsu no Anklet", performing the B-side "Omoidasete Yokatta".
On November 25, Rino Sashihara canceled her concurrent position to focus on her activities with HKT48.
2018: Debut single, New Artist Award
On January 16, the variety show , based on ''
AKBingo!
''AKBingo!'' (stylized in all caps) is a Japanese television variety show featuring Japanese idol girl group AKB48. The show aired weekly on Nippon Television. In each episode, members of AKB48 and occasionally their sister groups participate in ...
'' and hosted by the comedy duo Maple Chōgōkin (
Kazlaser and
Natsu Ando
is a Japanese comedian. She is represented by Sun Music Production. She is currently a member of the comedy duo Maple Chogoukin.
Filmography TV drama
Films
Original video
TV variety Former regular appearances
Former appearances
Special p ...
), started airing on
Nippon TV
JOAX-DTV (channel 4), branded as (NTV) or Nippon TV, is a Japanese television station serving the Kantō region as the flagship station of the Nippon News Network and the Nippon Television Network System, owned and operated by the , a sub ...
. It would run for 11 episodes.
STU48's first single, , was released on January 31. It sold an estimated 152,003 copies in its first week, according to ''Billboard Japan''. The group also participated in the AKB48 single "
Jabaja" released in March, performing the B-side "Pedal to Sharin to Kita Michi to".
On April 14, STU48 theater manager Manabu Yamamoto revealed the ship that would be used for the STU48 theater and announced that it would start operating in summer 2018. However, due to the
2018 Japan floods and other factors, the launch date would be delayed to spring 2019.
The release date of their second single, originally planned for August 29, was also postponed to February 13, 2019.
In October, the group announced the formation of five "extra-curricular" subunits. Besides performing music, each of these subunits would also focus on different types of activities. They released their first member guidebook titled on December 25.
In November, the group was selected as one of the New Artists of The Year for the 60th
Japan Record Awards
is a major music awards show, held annually in Japan that recognizes outstanding achievements in the Japan Composer's Association. Established in 1959, the Japan Record Awards are one of the oldest and most prestigious music awards in the countr ...
, making them a candidate to win the
Japan Record Award for Best New Artist
The Japan Record Award for is awarded annually. Until the 10th Japan Record Awards it was called the New Artist Award. Starting with the 11th, it has been called the Best New Artist Award. All artists awarded the New Artist Award are automatica ...
. They are the first group in the AKB48 Group to earn the distinction.
2019: Theater ship launch, second generation recruitment
On February 13, STU48 released their second single in five versions. The bonus content included DVDs featuring the members modelling the real-life
uniforms
A uniform is a variety of costume worn by members of an organization while usually participating in that organization's activity. Modern uniforms are most often worn by armed forces and paramilitary organizations such as police, emergency ser ...
of Setouchi schools. First week sales reached an estimated 276,000 copies according to Oricon, doubling that of their debut single. The music video for the title song, , was shot as one
long take
In filmmaking, a long take (also called a continuous take, continuous shot, or oner) is Shot (filmmaking), shot with a duration much longer than the conventional editing pace either of the film itself or of films in general. Significant camera mov ...
by quadcopter drone in
Onomichi, Hiroshima
is a Cities of Japan, city located in Hiroshima Prefecture, Japan.
, the city had an estimated population of 129,314 in 64055 households and a population density of 450 people per km². The total area of the city is .
Geography
Onomichi is loca ...
and released earlier on December 26, 2018.
On April 16, the group's newly remodeled ship, the ''STU48-go'', was officially launched in a
ship commissioning
Ship commissioning is the act or ceremony of placing a ship in active service and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to placing a warship i ...
ceremony at Hiroshima Port. The event was live streamed on
Showroom
A plumbing fixture showroom, Canada, 1921
A showroom is a large space used to display products or show entertainment.
Marketing location
A showroom is a large space used to display products for sale, such as automobiles, furniture, appliances ...
and attended by
Hiroshima Prefecture governor
Hidehiko Yuzaki
is a Japanese politician and the current governor of Hiroshima Prefecture in Japan.
Early life and education
Yuzaki was born October 4, 1965, in Saeki-ku, Hiroshima. He received his B.L. degree from the University of Tokyo in 1990 and his M. ...
and other government officials. STU48 performed live in the shipboard theater for the first time that evening, with an original
stage play
A play is a form of drama that primarily consists of dialogue between characters and is intended for theatrical performance rather than mere reading. The creator of a play is known as a playwright.
Plays are staged at various levels, ranging ...
titled "GO! GO! little SEABIRDS!!" produced by Nezumi Imamura.
The group's third single was released on July 31. The title song, , was performed by all 29 active members and trainees (Fu Yabushita would be absent as she was on hiatus for health reasons), and each subunit would have their own songs. The music video for the title song was released on July 2.
24 new members joined the group as second generation trainees, or . Their debut performance took place on the ''STU48-go'' on December 21 and 22.
2020: Mitsuki Imamura appointed captain, AKB48 Group singing contest
STU48's second original stage set list, titled and produced by then captain Nana Okada, was performed for the first time at the STU48 Theater on the ''STU48-go'' on January 11, and included the song by
=LOVE, an idol group produced by former STU48 and
HKT48
HKT48 (read "H.K.T. Forty-eight") is a Japanese idol group produced by Yasushi Akimoto. HKT48 is named after the Hakata-ku, Fukuoka, Hakata-ku ward of Fukuoka, where Akimoto originally intended to base the group. The group currently performs at ...
member Rino Sashihara. In several interviews, various members commented that the stage play was "interesting" and "difficult to express" since there are several songs with themes unfamiliar to the group, such as "queens and slaves" (
dominance and submission
Dominance and submission (D/s) is a set of behaviors, customs, and rituals involving the submission of one person to another in an erotic episode or lifestyle. It is a subset of BDSM. This form of sexual contact and pleasure has been shown to ...
) and
''yuri'', but also a good learning experience.
On January 18, during STU48's concert at
Tokyo Dome City Hall
The Tokyo Dome City Hall (TDC Hall) is a facility for sports, fashion shows, circuses, and live music, located inside Tokyo Dome City in Tokyo, Japan. It is on the opposite corner of the Tokyo Dome, and hosts a variety of events at any given t ...
, Nana Okada announced that she would step down as the group's captain and appointed Mitsuki Imamura as her successor and Akari Fukuda as deputy captain, but would retain her concurrent membership. The fourth single title song, , was performed live for the first time at the concert. The music video was recorded at the Chichibugahama Beach in Kagawa Prefecture and Ushimado Olive Garden in Okayama Prefecture, and features one of the group's most intense dance routines.

On March 28, due to the
COVID-19 pandemic
The COVID-19 pandemic (also known as the coronavirus pandemic and COVID pandemic), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began with an disease outbreak, outbreak of COVID-19 in Wuhan, China, in December ...
, STU48's third anniversary celebration was held via
live streaming
Livestreaming, live-streaming, or live streaming is the streaming media, streaming of video or Digital audio, audio in real-time communication, real time or near real time. While often referred to simply as ''streaming'', the real-time nature ...
on the video service
Niconico
, known before 2012 as , is a Japanese video sharing service based in Tokyo, Japan. "Niconico" or "nikoniko" is the Japanese sound symbolism, Japanese ideophone for smiling. As of 2021, Niconico is the 34th most-visited website in Japan, accordi ...
, where the fifth single was announced to be released on May 27. The music video for the title song, , was filmed at the Mitarai
preservation district in
Kure, Hiroshima
is a Cities of Japan, city in the Hiroshima Prefecture, Japan. , the city had an estimated population of 208,024 in 106,616 households and a population density of 590 persons per km2. The total area of the city is . With a strong industrial and ...
and released in two versions for the full members and trainees. The single would include ballots to vote for members of a new subunit called the Setouchi PR Unit, which results were announced on October 18.
In June, the group announced the renewal of the subunits and the formation of sister subunits to the existing ones for the second generation trainees.
In July, the online community Setouchi Library was launched, in which members can learn and collaborate in projects related to the Setouchi Region with the group's members and subject matter experts. The service was shut down in March 2022.
On December 1, Yura Ikeda and Nana Okada won the first and third places, respectively, at the third . Honoka Yano also ranked among the top 8 finalists. Among the six member groups of the
AKB48 Group
, or AKB48 sister groups, shortened to 48 Group or 48g, refers to the sister groups of the Japanese idol girl group AKB48. Based on the same concept "idols you can meet", it currently consists of five sister groups in locations across Japan and ...
, STU48 had the most members advancing to the finals with seven contestants: Yura Ikeda, Honoka Yano, Nana Okada (represented both STU48 and AKB48), Aiko Kojima, Arisa Mineyoshi, Mahina Taniguchi, and Sara Shimizu (dropped out due to health issues). In an interview, Okada commented that the group's achievements in the contest could be attributed to many members having trained since childhood, naming
Actor's School Hiroshima as one of the training grounds, and that singing abilities, while not essential for idols, would open many new opportunities for them.
2021–2022: Theater ship final tour, Nana Okada's departure, New Wave Project
On January 15, 2021, STU48 appeared in its first concert at the
Nippon Budokan
The , often shortened to simply Budokan, is an indoor arena in Chiyoda, Tokyo, Japan. It was originally built for the inaugural Olympic judo competition in the 1964 Summer Olympics. The Budokan was a popular venue for Japanese professional wres ...
, where they announced the release of their
sixth single on February 17 and performed the title song live for the first time. The ''STU48-go'' went on its final tour from April 10 to May 23, with the last stop of the tour being Hiroshima Port in Hiroshima City.
On September 12, during the last day of the STU48 summer tour at
Hiroshima Sun Plaza Hall,
the seventh single was announced. It was also announced that effective October 2021, all active second generation trainees would be promoted into full members. Nana Okada also announced that she would end her concurrency with STU48 after the promotions of the single has ended.
Her last concert with the group was on March 18, 2022, at the
Kobe Kokusai Hall.
On September 20, STU48 announced a collaboration with Actor's School Hiroshima called the "New Wave Project", an STU48 trainee recruitment project exclusively for active ASH students, at the 2021 ASH Autumn Act. Four New Wave Project participants were announced to have been accepted as STU48 trainees in February 2022 and started their activities in May.
In January 2022, STU48 members took five of the top 8 finalist positions at the fourth AKB48 Group No. 1 Singing Ability Contest, including the top three: Nana Okada (1st place), Yura Ikeda (2nd), Honoka Yano (3rd), Sara Shimizu (5th), and Mitsuki Imamura (7th). Their eighth single "
Hana wa Dare no Mono?" was released on April 13. They held their first concert at the
Hiroshima Green Arena
is an indoor arena located in Hiroshima, Japan. The original arena was built sometime shortly after World War II. The arena was rebuilt for the 1994 Asian Games. It hosted some of the group games for the 2006 FIVB Men's World Championship and t ...
on July 11 for their fifth anniversary celebration.
2023–present: Mitsuki Imamura's graduation, Azumi Okada appointed captain
On December 24, 2023, during STU48's annual Christmas concert, captain Mitsuki Imamura announced that she will be graduating from the group. Her graduation concert was on March 31, 2024, at the Hiroshima International Conference Center. 2.5th Generation member Azumi Okada took Imamura's place as captain.
Former shipboard theater
The former STU48 Theater was situated on a
ferry
A ferry is a boat or ship that transports passengers, and occasionally vehicles and cargo, across a body of water. A small passenger ferry with multiple stops, like those in Venice, Italy, is sometimes referred to as a water taxi or water bus ...
named and was the first shipboard theater in Japan. The ship was formerly called and operated by , and has previously been a passenger ship and a
roll-on/roll-off
Roll-on/roll-off (RORO or ro-ro) ships are cargo ships designed to carry wheeled cargo, such as cars, motorcycles, trucks, semi-trailer trucks, buses, Trailer (vehicle), trailers, and railroad cars, that are driven on and off the ship on their ...
(RORO) cargo ship before acquired by the STU48 management.
The name of the ship was decided through contest, which was announced on May 11, 2018, by the STU48 management. From around 2000 names which were submitted, 24 were chosen by the members for the final voting by fans on June 30 through the streaming app
SHOWROOM
A plumbing fixture showroom, Canada, 1921
A showroom is a large space used to display products or show entertainment.
Marketing location
A showroom is a large space used to display products for sale, such as automobiles, furniture, appliances ...
, and ''STU48-go'' earned the most votes (9.8%), making it the new name of the ship.
The remodeling of ''STU48-go'' was carried out at the
Japan Marine United
(informally JMU) is a Japanese ship building marine engineering and service company headquartered in Yokohama, Japan.
It's Japan's second largest shipbuilder after Imabari Shipbuilding, with shipyard facilities in Kure, Hiroshima, Yokohama, Na ...
facilities in Onomichi, Hiroshima with technical support from the
, especially concerning safety measures.
Several STU48 members visited the shipyard during the process, and Azusa Fujiwara and Honoka Yano personally painted the ship's name on her
bow.
On January 22, 2019, the group released a music video for the song "Shukkō" from their then upcoming second single, which was shot on the ship and unfinished onboard theater and performed by all 33 members and trainees active at the time.
On February 25, the group released a list of ports in the Setouchi Region where the ship was planned to dock for performances.
On March 19, the
certificate of nationality for the ship was issued. The ship was officially
commissioned on April 16.
The port and starboard hulls of the ship bore the code "UW2",
which means "Welcome" in
maritime flag signaling.
On July 15, ''STU48-go'' was present at the
Marine Day
, also known as "Ocean Day" or "Sea Day", is a public holiday in Japan usually celebrated on the third Monday in July. The purpose of the holiday is to give thanks for the ocean's bounty and to consider the importance of the ocean to Japan as a ...
event organized by the C to Sea Project, held at the
Port of Tokyo
The Port of Tokyo is one of the largest Japanese seaports and one of the largest seaports in the Pacific Ocean basin having an annual traffic capacity of around 100 million tonnes of cargo and 4,500,000 twenty-foot equivalent units.
The port is a ...
.
On July 9, 2020, the STU48 management announced that the shipboard theater would be
decommissioned in the spring of 2021, and that performances would be held around the Setouchi Region with no fixed venue. On February 7, 2021, the ship's last tour was announced, starting on April 10 and ending on May 23, with the last stop of the tour being Hiroshima Port in Hiroshima City.
The ship has since been returned to Iki-Tsushima Sea Line and renamed back to ''Mikasa''.
Reception
In a January 23, 2019 article, ''
Tokyo Sports
is a Japanese daily sports newspaper founded in 1960.
See also
* Tokyo Sports Film Award
* Tokyo Sports Puroresu Awards
References
External links
* http://www.tokyo-sports.co.jp Official website
1960 establishments in Japan
Da ...
'' remarked that STU48 has the "highest level of stage performance" in the AKB48 Group, and that many of its members have a "neat" image similar to that of
Nogizaka46
is a Japanese female idol group produced by Yasushi Akimoto, created as the "official rival" of the group AKB48. They are the first group from the Sakamichi Series, which also includes sister groups Sakurazaka46 (formerly Keyakizaka46), Yoshim ...
. Since Nogizaka46 and the other
Sakamichi Series
refers to a Japanese idol group franchise that began with Nogizaka46, an "official" rival group of AKB48. It currently consists of four groups: Nogizaka46, Sakurazaka46, Hinatazaka46, and Yoshimotozaka46. Despite the name, the groups are n ...
groups do not have their own theaters, STU48 has the opportunity to win over fans who wish for closer interaction through their regular theater performances. The article also predicted that the
NGT48 assault scandal, which came to light earlier that month, might cause that group's fans to switch to STU48, in part due to captain Nana Okada's "dislike of disturbance" and "ability to keep the members disciplined".
Awards
The following table lists some of the major awards received by the group.
Subunits
These are the active subunits as of July 2022. All members belong to at least one subunit.
Girls' journey units
The theme of "girls' journey" refers to literally visiting Setouchi tourism destinations and promoting them domestically and overseas and exploring the world of beauty and fashion. They have their own travel-related television programs, such as on
Shinhiroshima Telecasting
JORM-DTV (channel 8), branded as is a Japanese television station that serves as an affiliate of the dual Fuji News Network (FNN) and Fuji Network System (FNS) in Hiroshima Prefecture, owned-and operated by Based in Hiroshima, the station ha ...
and on
Yamaguchi Broadcasting.
Charming Trip
little Charming Trip
Shikoku units
These units promote
Shikoku
is the smallest of the List of islands of Japan#Main islands, four main islands of Japan. It is long and between at its widest. It has a population of 3.8 million, the least populated of Japan's four main islands. It is south of Honshu ...
, one of Japan's five major islands, especially its less-known interesting places and activities.
Katte ni! Shikoku Kanko Taishi
All members except Yuka Oki are Shikoku natives.
Katte ni! Shikoku Kanko Guide
Performance units
The performance units focus on singing and dancing skills.
STUDIO
On November 15, 2018, Imamura and Miyuna Kadowaki were two of the three 48 Group members (the third being Hijiri Tanikawa of AKB48) selected to become the lead performers for the "
No Way Man" live performance in ''
Best Hits Kayosai'', replacing the members who transferred to
IZ*ONE
Iz*One ( ; ; ; stylized in all caps) was a South Korean–Japanese girl group formed through the Mnet (TV channel), Mnet reality competition show ''Produce 48''. The group was composed of twelve members: Jang Won-young, Sakura Miyawaki, Jo Yu-r ...
(namely
Hitomi Honda
is a Japanese singer and actress based in South Korea. She is a member of the South Korean girl group Say My Name, and former member of South Korean–Japanese project girl group Iz*One and Japanese girl group AKB48.
Career 2012–2017: Early ...
of AKB48 and
Sakura Miyawaki
Sakura Miyawaki (born March 19, 1998), also known mononymously as Sakura, is a Japanese singer and actress based in South Korea. She is a member of the South Korean girl group Le Sserafim, and a former member of South Korean-Japanese girl group ...
and
Nako Yabuki of
HKT48
HKT48 (read "H.K.T. Forty-eight") is a Japanese idol group produced by Yasushi Akimoto. HKT48 is named after the Hakata-ku, Fukuoka, Hakata-ku ward of Fukuoka, where Akimoto originally intended to base the group. The group currently performs at ...
), after passing the dance audition held by
Yomiuri TV
JOIX-DTV (channel 10), branded as , is the Kansai region flagship station of the Nippon News Network and the Nippon Television Network System, owned by the , itself a subsidiary of Yomiuri Chukyo FS Broadcasting Holdings. FYCS is partially c ...
.
mini STUDIO
MC & sports units
MiKER!
MiKER! is a merger between the former MC unit and sports unit . Kai and Shinano were members of both units.
On November 3, 2018, Kai, Takino, and former Seto 7 member Maiha Morishita participated in the 38th Hiroshima International Peace Marathon.
pin MiKER!
Aoi Himawari
Aoi Himawari is the only unit which includes a former STU48 member, Miyu Sakaki, and all the other members are concurrently members of other units.
On September 26, 2021, they held their first solo live at the Cave-Be live house in Hiroshima.
Setouchi PR Unit
Original
Membership into this unit was based on fan voting using the ballots included with the fifth single.
Season 2
The voting for the second Setouchi PR Unit took place from April 13 to May 2, 2022, using ballots included with
the eighth single. The results were announced on May 23.
Members
Regular members
1st Generation
The first generation members of STU48 originally consisted of 31 people and joined the group on March 31, 2017.
3rd Draft
The 3rd Draft members were recruited at the third AKB48 Group Draft Conference, a joint audition for AKB48 and all its Japan-based sister groups. Originally consisting of five people, they debuted as trainees in January 2018. Two trainees left the group and the three remaining ones became full members on August 3, 2019.
2nd Generation
The second generation member recruitment began in August 2019.
24 people who passed the auditions debuted as trainees in December 2019
and the remaining ones became full members in October 2021.
2.5th Generation
This batch was recruited through the New Wave recruitment project, held exclusively for
Actor's School Hiroshima students, and was originally referred to as the New Wave Project trainees. Four candidates who passed the auditions debuted as trainees in May 2022.
It was officially designated 2.5th Generation during the group's sixth anniversary concert.
On April 1, 2024, following Mitsuki Imamura's graduation, all its members became full members.
Trainees
3rd Generation
The third generation members were publicly introduced in April 2023.
Former members
Discography
Singles
AKB48 single B-sides
* "Setouchi no Koe" ("
Negaigoto no Mochigusare", 2017),
included again in "Kurayami" in 2018
* "Omoidasete Yokatta" ("
11gatsu no Anklet", 2017)
* "Pedal to Sharin to Kita Michi to" ("
Jabaja", 2018)
References
External links
*
{{Authority control
AKB48 Group
Japanese girl groups
Musical groups established in 2017
Japanese idol groups
2017 establishments in Japan