The is the advance of the

cherry blossoms The cherry blossom, or sakura, is the flower of trees in ''Prunus'' subgenus '' Cerasus''. ''Sakura'' usually refers to flowers of ornamental cherry trees, such as cultivars of ''Prunus serrulata'', not trees grown for their fruit (although ...

across

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

. The

Japan Meteorological Agency The Japan Meteorological Agency (JMA; ''気象庁, Kishō-chō'') is a division of the Ministry of Land, Infrastructure, Transport and Tourism dedicated to the Scientific, scientific observation and research of natural phenomena. Headquartered ...

records the opening and full bloom of the blossoms from

Kyūshū is the third-largest island of Japan's four main islands and the most southerly of the four largest islands (i.e. excluding Okinawa and the other Ryukyu (''Nansei'') Islands). In the past, it has been known as , and . The historical regio ...

in late March to

Hokkaidō is the second-largest island of Japan and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by railway via the Seikan Tunnel. The ...

in the middle of May. The advancing front is also the subject of regular reports by the major

news agencies A news agency is an organization that gathers news reports and sells them to subscribing news organizations, such as newspapers, magazines and radio and television broadcasters. A news agency may also be referred to as a wire service, newswir ...

. The cherry blossom is of great public interest in Japan due to its symbolism and the custom of flower viewing known as ''

hanami is the Japanese traditional custom of enjoying the transient beauty of flowers; in this case almost always mean those of the or, less frequently, trees. From the end of March to early May, cherry trees bloom all over Japan, and around the s ...

''.

Forecasts

From 1951 the

produced forecasts for the

Kantō region The is a geography, geographical region of Honshu, the largest island of Japan. In a common definition, the region includes the Greater Tokyo Area and encompasses seven prefectures of Japan, prefectures: Chiba Prefecture, Chiba, Gunma Prefe ...

and from 1955 for the whole of Japan excepting

Okinawa most commonly refers to: * Okinawa Prefecture, Japan's southernmost prefecture * Okinawa Island, the largest island of Okinawa Prefecture * Okinawa Islands, an island group including Okinawa itself * Okinawa (city), the second largest city in th ...

and the

Amami Islands The The name ''Amami-guntō'' was standardized on February 15, 2010. Prior to that, another name, ''Amami shotō'' (奄美諸島), was also used. is a Japanese archipelago in the Satsunan Islands, which is part of the Ryukyu Islands, and is sout ...

. From 2010, the Agency left forecasting to the

private sector The private sector is the part of the economy which is owned by private groups, usually as a means of establishment for profit or non profit, rather than being owned by the government. Employment The private sector employs most of the workfo ...

although it continues to observe and determine the impact of the climate upon the flowering of the cherry. The forecast is based on the

Arrhenius equation In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates. The equation was proposed by Svante Arrhenius in 1889, based on the work of Dutch chemist Jacobus Henricus van 't Hoff who had noted in 188 ...

, with the formula

\text = \exp\left .5 \times 10^3 \cdot \frac\right

where ''T'' is the mean day temperature in

kelvin The kelvin (symbol: K) is the base unit for temperature in the International System of Units (SI). The Kelvin scale is an absolute temperature scale that starts at the lowest possible temperature (absolute zero), taken to be 0 K. By de ...

s, and DTS represents the number of days transformed to

standard temperature Standard temperature and pressure (STP) or standard conditions for temperature and pressure are various standard sets of conditions for experimental measurements used to allow comparisons to be made between different sets of data. The most used ...

Blossoming

The day of opening Japanese terms: ; ; ; is defined as the point at which at least five to six flowers have opened on the sample tree. The day of full bloom is when at least 80% of the flowers have opened. The Yoshino cherry is typically observed since, from the late

Edo period The , also known as the , is the period between 1600 or 1603 and 1868 in the history of Japan, when the country was under the rule of the Tokugawa shogunate and some 300 regional ''daimyo'', or feudal lords. Emerging from the chaos of the Sengok ...

, it has been planted across the

archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands. An archipelago may be in an ocean, a sea, or a smaller body of water. Example archipelagos include the Aegean Islands (the o ...

. Sample trees also include the

Higan cherry is a Buddhist holiday exclusively celebrated by Japanese sects for seven days; three days before and after both the Spring equinox ( shunbun) and Autumnal equinox (shūbun). It is observed by nearly every Buddhist school in Japan. The tradit ...

in the south and ''

Prunus sargentii ''Prunus sargentii'', commonly known as Sargent's cherry or North Japanese hill cherry, is a species of cherry native to Japan, Korea, Sakhalin (Russia), and China. The tree was named for Charles Sprague Sargent. Description ''Prunus sarg ...

'' (Sargent's cherry) in the north. In 2006 it was reported that the cherry blossoms might overtake the

plum blossoms ''Prunus mume'', the Chinese plum or Japanese apricot, is a tree species in the family Rosaceae. Along with bamboo, the plant is intimately associated with art, literature, and everyday life in China, from where it was then introduced to Kor ...

before reaching Hokkaidō.

Sample trees

There are fifty-nine sample trees at any one time. Successor junior trees are selected from among prospective candidates when an incumbent becomes too old or is otherwise incapacitated. For instance, the sample tree in Mito collapsed under the weight of

snow Snow consists of individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes. It consists of frozen crystalline water througho ...

in 2005, while that at the southern tip of

Ishigaki Island , also known as ''Ishigakijima'', is a Japanese island south-west of Okinawa Hontō and the second-largest island of the Yaeyama Island group, behind Iriomote Island. It is located approximately south-west of Okinawa Hontō. It is within t ...

was felled by a

typhoon A typhoon is a tropical cyclone that develops between 180° and 100°E in the Northern Hemisphere and which produces sustained hurricane-force winds of at least . This region is referred to as the Northwestern Pacific Basin, accounting for a ...

a year later. The fifty-nine sample trees are located across Japan, corresponding to the sites of the Agency's principal

weather stations A weather station is a facility, either on land or sea, with instruments and equipment for measuring atmospheric conditions to provide information for weather forecasts and to study the weather and climate. The measurements taken include tempera ...

: *

: Ishigaki,

Miyako-jima is the largest and the most populous island among the Miyako Islands of Okinawa Prefecture, Japan. Miyako Island is administered as part of the City of Miyako Island, which includes not only Miyako Island, but also five other islands. Geogr ...

Naha is the Cities of Japan, capital city of Okinawa Prefecture, the southernmost prefecture of Japan. As of 1 June 2019, the city has an estimated population of 317,405 and a population density of 7,939 people per km2 (20,562 persons per sq. mi.). ...

, Minamidaitō *

/ Yamaguchi:

Fukuoka is the List of Japanese cities by population, sixth-largest city in Japan and the capital city of Fukuoka Prefecture, Japan. The city is built along the shores of Hakata Bay, and has been a center of international commerce since ancient times. ...

Shimonoseki file:141122 Shimonoseki City Hall Yamaguchi pref Japan01s3.jpg, 260px, Shimonoseki city hall is a Cities of Japan, city located in Yamaguchi Prefecture, Japan. , the city had an estimated population of 248,193 in 128,762 households and a pop ...

, Ōita,

Nagasaki , officially , is the capital and the largest Cities of Japan, city of Nagasaki Prefecture on the island of Kyushu in Japan. Founded by the Portuguese, the port of Portuguese_Nagasaki, Nagasaki became the sole Nanban trade, port used for tr ...

Saga Sagas are prose stories and histories, composed in Iceland and to a lesser extent elsewhere in Scandinavia. The most famous saga-genre is the (sagas concerning Icelanders), which feature Viking voyages, migration to Iceland, and feuds between ...

Kumamoto is the capital Cities of Japan, city of Kumamoto Prefecture on the island of Kyushu, Japan. , the city has an estimated population of 738,907 and a population density of 1,893 people per km2. The total area is 390.32 km2. had a populat ...

, Miyazaki,

Kagoshima , is the capital Cities of Japan, city of Kagoshima Prefecture, Japan. , the city had an estimated population of 583,966 in 285,992 households, and a population density of 1100 persons per km2. The total area of the city is . Etymology While the ...

Amami The The name ''Amami-guntō'' was standardized on February 15, 2010. Prior to that, another name, ''Amami shotō'' (奄美諸島), was also used. is a Japanese archipelago in the Satsunan Islands, which is part of the Ryukyu Islands, and is sout ...

( formerly

Naze The Naze is a headland on the east coast of England. It is on the coast of Essex just north of River Blackwater, Essex, Blackwater and projects into the North Sea. This area is south of the double estuary of the River Stour, Suffolk, River St ...

) *

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 ...

Takamatsu file:Takamatsu City Hall.jpg, 270px, Takamatsu City Hall file:Takamatsu city center area Aerial photograph.2007.jpg, 270px, Aerial view of Takamatsu city center file:Takamatsu200910cut.JPG, 270px, View from Yashima to Takashima port is a capital ...

Tokushima is a Prefectures of Japan, prefecture of Japan located on the island of Shikoku. Tokushima Prefecture has a population of 682,439 (1 February 2025) and has a geographic area of 4,146 Square kilometre, km2 (1,601 sq mi). Tokushima Prefecture b ...

Matsuyama 270px, Matsuyama City Hall 270px, Ehime Prefectural Capital Building is the capital city of Ehime Prefecture, on the island of Shikoku, in Japan and is also Shikoku's largest city. , the city had an estimated population of 505,948 in 243,541 h ...

Kōchi Kochi is a city in Kerala, India. Kochi or Kōchi may also refer to: People * Kochi people, a predominantly Pashtun nomadic people of Afghanistan * , a Japanese surname: ** Arata Kochi (born 1948 or 1949), Japanese physician and World Health Org ...

* Chūgoku:

Hiroshima is the capital of Hiroshima Prefecture in Japan. , the city had an estimated population of 1,199,391. The gross domestic product (GDP) in Greater Hiroshima, Hiroshima Urban Employment Area, was US$61.3 billion as of 2010. Kazumi Matsui has b ...

Okayama is the prefectural capital, capital Cities of Japan, city of Okayama Prefecture in the Chūgoku region of Japan. The Okayama metropolitan area, centered around the city, has the largest urban employment zone in the Chugoku region of western J ...

Matsue is the capital Cities of Japan, city of Shimane Prefecture, Japan, located in the Chūgoku region of Honshu. , the city had an estimated population of 196,748 in 91287 households and a population density of 340 persons per km². The total area of ...

, Tottori *

Kinki The or the lies in the southern-central region of Japan's main island Honshū. The region includes the prefectures of Nara, Wakayama, Kyoto, Osaka, Hyōgo and Shiga, often also Mie, sometimes Fukui, Tokushima and Tottori. The metropolit ...

Ōsaka is a designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the third-most populous city in Japan, following the special wards of Tokyo and Yokohama. With a population ...

Hikone is a city located in Shiga Prefecture, Japan. , the city had an estimated population of 111,958 in 49,066 households and a population density of 570 persons per km². The total area of the city is . Geography Hikone is located in central Shig ...

Kyōto Kyoto ( or ; Japanese: , ''Kyōto'' ), officially , is the capital city of Kyoto Prefecture in the Kansai region of Japan's largest and most populous island of Honshu. , the city had a population of 1.46 million, making it the ninth-most pop ...

Maizuru is a city in Kyoto Prefecture, Japan. , the city had an estimated population of 78,644 in 34,817 households and a population density of 230 persons per km2. The total area of the city is . Geography Maizuru is located in northern Kyoto Prefectu ...

Kobe Kobe ( ; , ), officially , is the capital city of Hyōgo Prefecture, Japan. With a population of around 1.5 million, Kobe is Japan's List of Japanese cities by population, seventh-largest city and the third-largest port city after Port of Toky ...

Nara The National Archives and Records Administration (NARA) is an independent agency of the United States government within the executive branch, charged with the preservation and documentation of government and historical records. It is also task ...

Wakayama Wakayama may refer to: * Wakayama Prefecture, a prefecture of Japan * Wakayama (city), the capital city of Wakayama Prefecture, Japan * Wakayama Station, a train station in Wakayama, Wakayama * Wakayama University, a national university in Wakayama, ...

* Tōkai:

Nagoya is the largest city in the Chūbu region of Japan. It is the list of cities in Japan, fourth-most populous city in Japan, with a population of 2.3million in 2020, and the principal city of the Chūkyō metropolitan area, which is the List of ...

Shizuoka Shizuoka can refer to: * Shizuoka Prefecture, a Japanese prefecture * Shizuoka (city), the capital city of Shizuoka Prefecture * Shizuoka Airport * Shizuoka Domain, the name from 1868 to 1871 for Sunpu Domain was a feudal domain under the Tok ...

Gifu is a Cities of Japan, city located in the south-central portion of Gifu Prefecture, Japan, and serves as the prefectural capital. The city has played an important role in Japan's history because of its location in the middle of the country. Durin ...

, Tsu * Kantō:

Tōkyō Tokyo, officially the Tokyo Metropolis, is the capital and most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is one of the most populous urban areas in the world. The Greater Tokyo Area, which ...

, Mito,

Utsunomiya is the capital and largest city of Tochigi Prefecture in the northern Kantō region of Japan. , the city had an estimated population of 513,584, and a population density of . The total area of the city is . Utsunomiya is famous for its ''gyoza'' ...

Maebashi is the capital city of Gunma Prefecture, in the northern Kantō region of Japan. , the city had an estimated population of 335,352 in 151,171 households, and a population density of 1100 persons per km2. The total area of the city is . It was ...

Kumagaya is a city located in Saitama Prefecture, Japan. , the city had an estimated population of 195,277 in 87,827 households and a population density of 1200 persons per km2. The total area of the city is . Geography Kumagaya is one of the largest cit ...

Chōshi Chōshi (, ) is a city located in Chiba Prefecture, Japan. , the city had an estimated population of 59,174 in 27,160 households and a population density of . The total area of the city is . Geography Chōshi is located in the northeastern part ...

Yokohama is the List of cities in Japan, second-largest city in Japan by population as well as by area, and the country's most populous Municipalities of Japan, municipality. It is the capital and most populous city in Kanagawa Prefecture, with a popu ...

, Nagano,

Kōfu is the capital Cities of Japan, city of Yamanashi Prefecture, Japan. , the city had an estimated population of 187,985 in 90,924 households, and a population density of 880 persons per km2. The total area of the city is . Overview Toponymy Kōfu ...

* Hokuriku: Niigata,

Toyama Toyama may refer to: Places * Toyama Prefecture, a prefecture of Japan located in the Hokuriku region on the main Honshu island * Toyama (city), the capital city of Toyama Prefecture * Toyama Station, the main station of Toyama, Toyama * Toyama Sta ...

Kanazawa is the capital of Ishikawa Prefecture in central Japan. , the city had an estimated population of 466,029 in 203,271 households, and a population density of 990 persons per km2. The total area of the city was . Etymology The name "Kanazaw ...

, Fukui * Tōhoku:

Sendai is the capital Cities of Japan, city of Miyagi Prefecture and the largest city in the Tōhoku region. , the city had a population of 1,098,335 in 539,698 households, making it the List of cities in Japan, twelfth most populated city in Japan. ...

Aomori , officially Aomori City (, ), is the capital Cities of Japan, city of Aomori Prefecture, in the Tōhoku region of Japan. , the city had an estimated population of 264,945 in 136,781 households, and a population density of 321 people per squa ...

, Akita,

Morioka is the capital Cities of Japan, city of Iwate Prefecture located in the Tōhoku region of northern Japan. On 1 August 2023, the city had an estimated population of 283,981 in 132,719 households, and a population density of . The total area of t ...

, Yamagata, Fukushima *

Sapporo is a Cities designated by government ordinance of Japan, designated city in Hokkaido, Japan. Located in the southwest of Hokkaido, it lies within the alluvial fan of the Toyohira River, a tributary of the Ishikari River. Sapporo is the capital ...

Wakkanai file:Wakkanai city office.JPG, 290px, Wakkanai City Hall file:Wakkanai shore.jpg, 290px, Shore of Wakkanai is a Cities of Japan, city located in Sōya Subprefecture, Hokkaido, Japan. Wakkanai is the capital of Sōya Subprefecture. Situated approx ...

Asahikawa is a Cities of Japan, city in Kamikawa Subprefecture, Hokkaido, Japan. It is the capital of the subprefecture, and the second-largest city in Hokkaido, after Sapporo. It has been a Core cities of Japan, core city since April 1, 2000. The city i ...

Abashiri is a city located in Okhotsk Subprefecture, Hokkaido, Japan. Abashiri is known as the site of the Abashiri Prison, a Meiji-era facility used for the incarceration of political prisoners. The old prison has been turned into a museum, but the ...

Obihiro is a Cities of Japan, city in Tokachi Subprefecture, Hokkaido, Japan. Obihiro is the only designated city in the Tokachi Subprefecture, Tokachi area. As of July 31, 2023, the city had an estimated population of 163,084. The next most populou ...

Kushiro is a city in Kushiro Subprefecture on the island of Hokkaido, Japan. Located along the coast of the North Pacific Ocean, it serves as the subprefecture's capital and it is the most populated city in the eastern part of the island. History An ...

Muroran is a city and port located in Iburi Subprefecture, Hokkaido, Japan. It is the capital city of Iburi Subprefecture. As of January 31, 2024, the city had an estimated population of 76,385, with 43,494 households and a population density of . The ...

Hakodate is a Cities of Japan, city and seaports of Japan, port located in Oshima Subprefecture, Hokkaido, Japan. It is the capital city of Oshima Subprefecture. As of January 31, 2024, the city had an estimated population of 239,813 with 138,807 househol ...

Notes

References

External links