is a Japanese professional

footballer A football player or footballer is a sportsperson who plays one of the different types of football. The main types of football are association football, American football, Canadian football, Australian rules football, Gaelic football, rugby lea ...

who plays as a

forward Forward is a relative direction, the opposite of backward. Forward may also refer to: People *Forward (surname) Sports * Forward (association football) * Forward (basketball), including: ** Point forward ** Power forward (basketball) ** Smal ...

for

FC Ryukyu is a Japanese professional football club based in Okinawa. The club plays in the J3 League, Japanese third tier of professional football. The team's home stadium is Okinawa Athletic Park Stadium, in Okinawa Prefecture, Japan. The team derive ...

Playing career

Ishii was born in the

Fukuoka Prefecture is a Prefectures of Japan, prefecture of Japan located on the island of Kyūshū. Fukuoka Prefecture has a population of 5,109,323 (1 June 2019) and has a geographic area of 4,986 Square kilometre, km2 (1,925 sq mi). Fukuoka Prefecture borders ...

on April 2, 2000. He joined

J1 League The , the J.League or the for sponsorship reasons, is a professional association football league in Japan and the highest level of the Japanese football league system. Contested by 20 clubs, it operates on a system of promotion and relegation ...

club

Sagan Tosu is a Japanese professional Association football, football club based in Tosu, Saga, Tosu, Saga Prefecture. The club plays in the J2 League, the second tier of Japanese football, since 2025 following relegation from the J1 League in 2024 J1 Leag ...

from their youth team in 2018. He made his debut for Sagan on the 15 June 2019 against

Urawa Red Diamonds The or simply Urawa Reds (浦和レッズ, ''Urawa Rezzu''), also known as Mitsubishi Urawa Football Club from April 1992 to January 1996, are a professional association football, football club in the city of Saitama (city), Saitama, part of t ...

. He scored his first goal for Sagan against

Cerezo Osaka is a Japanese professional football club based in Osaka. The club currently plays in the J1 League, which is the top tier of football in the country. The club's name ''Cerezo'' (Spanish for cherry blossom) is also the flower of the city of Osak ...

, scoring in the 51st minute on the 26 July 2020. Kaisei made his debut for Ehime against

Giravanz Kitakyushu is a Japanese football club based in Kitakyushu, Fukuoka Prefecture. They currently play in J3 League, Japanese third tier of professional league football. History Mitsubishi Chemical SC (1947 –2000) The club was formed in 1947 as part o ...

on the 20th of June 2021. He scored his first goal for the club on the 12 September 2021, scoring in the 62nd minute. Kaisei is yet to make an appearance for Yokohama.

Career statistics

Last update: ''27 February 2019''

Honours

Sagan Tosu *

Lunar New Year Cup The Lunar New Year Cup, previously known as the Carlsberg Challenge or the Carlsberg Cup, is an annual invitational association football, football tournament organised in Hong Kong by the Hong Kong Football Association (HKFA) since 1908. It is usua ...

2019 This was the year in which the first known human case of COVID-19 was documented, preceding COVID-19 pandemic, the pandemic which was declared by the World Health Organization the following year. Up to that point, 2019 had been described as ...

(runners-up) Yokohama FC *

J2 League The or simply J2 is the second division of the and the second level of the Japanese association football league system. The top tier is represented by the J1 League. It (along with the rest of the J.League) is currently sponsored by Meiji Yasud ...

2022 The year began with another wave in the COVID-19 pandemic, with SARS-CoV-2 Omicron variant, Omicron spreading rapidly and becoming the dominant variant of the SARS-CoV-2 virus worldwide. Tracking a decrease in cases and deaths, 2022 saw ...

(runners-up)

References

External links

* {{DEFAULTSORT:Ishii, Kaisei 2000 births Living people Association football people from Fukuoka Prefecture Japanese men's footballers J1 League players Sagan Tosu players J2 League players Ehime FC players Yokohama FC players Men's association football forwards