is a song by Japanese singer-songwriter

Gen Hoshino is a Japanese singer-songwriter, musician, actor, and writer. Career Music Since 2000, Hoshino has led the instrumental band Sakerock, where he plays marimba and guitar. They released over ten albums before disbanding in 2015. As a solo artist, ...

. It was released on 5 October 2016 through

Victor Entertainment , also known as in Japan, is a subsidiary of JVCKenwood that produces and distributes music, movies and other entertainment products such as anime and television shows in Japan. It is known as JVC Entertainment in countries where Sony Music Ent ...

and Speedstar Records as Hoshino's ninth single, and served as the theme song for the TBS

television series A television show – or simply TV show – is any content produced for viewing on a television set which can be broadcast via over-the-air, satellite television, satellite, or cable television, cable, excluding breaking news, television adverti ...

The Full-Time Wife Escapist is a Japanese romance manga, romance ''Josei Manga, josei'' manga series written and illustrated by Tsunami Umino. The original title is from a Hungarian language, Hungarian proverb: "Running away is shameful, but useful" (, ). It was publish ...

'', in which he starred alongside

Yui Aragaki is a Ryukyuan Japanese actress, model, singer and occasional radio show host. She has been selected several times as the most desired girlfriend and the most desired female celebrity face in Oricon's yearly survey. Early life She was born on J ...

Commercial performance

"Koi" was a commercial success in Japan. The single debuted at number two on the

Oricon Singles Chart The Oricon Singles Chart is the Japanese music industry-standard singles popularity chart issued daily, weekly, monthly and yearly by Oricon. Chart rankings are based on physical singles' sales. Until 2017, Oricon did not track download sales. In J ...

and the ''

Billboard A billboard (also called a hoarding in the UK and many other parts of the world) is a large outdoor advertising structure (a billing board), typically found in high-traffic areas such as alongside busy roads. Billboards present large advertise ...

Japan Hot 100 The ''Billboard Japan'' Hot 100 is a record chart in Japan for songs. It has been compiled by ''Billboard Japan'' and '' Hanshin Contents Link'' since February 2008. The chart is updated every Wednesday at Billboard-japan.com ( JST) and every Thur ...

chart, before peaking at

number one Number One most commonly refers to: * 1 (number) Number One, No. 1, or #1 may also refer to: Music Albums * ''Number 1'' (Big Bang album), and the title song * ''No. 1'' (BoA album), and the title song * ''No.1'' (EP), by CLC * ''n.1' ...

on the Japan Hot 100 the week after, becoming Hoshino's first number one song on the Japan Hot 100 chart. Since then, it has topped the chart for a total of 11 non-consecutive weeks and has spent 136 weeks on the chart , making it the song with most weeks at number one and the ninth for most weeks on the chart. It won Song of the Year by Download at the 31st

Japan Gold Disc Award The is an award presented by the Recording Industry Association of Japan The is an industry trade group composed of Japanese corporations involved in the music industry. It was founded in 1942 as the Japan Phonogram Record Cultural Associa ...

, and topped the Japan Hot 100-year-end list in 2017. The CD single has been certified

Platinum Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish , a diminutive of "silver". Platinu ...

by the

Recording Industry Association of Japan The is an industry trade group composed of Japanese corporations involved in the music industry. It was founded in 1942 as the Japan Phonogram Record Cultural Association, and adopted its current name in 1969. The RIAJ's activities include pr ...

(RIAJ), while the song has been certified

Million One million (1,000,000), or one thousand thousand, is the natural number following 999,999 and preceding 1,000,001. The word is derived from the early Italian ''millione'' (''milione'' in modern Italian), from ''mille'', "thousand", plus the au ...

. Overall, it has sold over 2.3 million copies in Japan.

Music video

The accompanying music video, styled in black, white, and yellow and directed by Kazuaki Seki, features Hoshino and

Elevenplay Elevenplay is a Japanese dance troupe noted for their incorporation of advanced technologies into their works. It is headed by director and principal choreographer Mikiko. Performances The collaborated with the Rhizomatics groups to produce a p ...

dancers performing a series of dance moves, dubbed the "Koi Dance", as choreographed by

Perfume Perfume (, ; french: parfum) is a mixture of fragrant essential oils or aroma compounds (fragrances), fixatives and solvents, usually in liquid form, used to give the human body, animals, food, objects, and living-spaces an agreeable scent. Th ...

choreographer, Mikiko Mizuno. Performed by ''The Full-Time Wife Escapist'' cast at the end of every episode, the dance became popular in Japan and has since been widely covered on YouTube and social media. To date, the music video has been viewed over 200 million times on

YouTube YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by ...

Track listing

Charts

Weekly charts

Year-end charts

Sales and certifications

Release history

References

{{authority control 2016 songs 2016 singles Billboard Japan Hot 100 number-one singles Japanese television drama theme songs Japanese-language songs LGBT-related songs