# Kōichi

Kōichi, Koichi, Kouichi or Kohichi is a masculine Japanese given name.

## Written forms

Kōichi can be written using different kanji characters and can mean:
* 晃一, "clear, one"
* 幸一, "happiness, one"
* 光一, "light, one"
* 孝一, "filial piety, one"
* 弘一, "vast, one"
* 浩一, "abundance, one"
* 宏一, "wide, one"
* 恒一, "constancy, one"
* 耕一, "cultivate, one"
* 孝市, "filial piety, market"
The name can also be written in hiragana (こういち) or katakana (コウイチ).

## People with the name

* Kohichi Amano (天野 浩一, born 1979), Japanese baseball player
* Koichi Chigira (孝一, born 1959), Japanese anime director
* Koichi Domoto (born 1979), Japanese performing artist
* Kōichi Fukaura, Japanese shogi player
* Koichi Fukuda (born 1975), Japanese musician
* Koichi Hamada (浜田 宏一, born 1936), Japanese economist
* Kōichi Hamada (浜田 幸一, 1928–2012), Japanese politician
* Koichi Iida ((飯田 鴻一, 1888–1973), Japanese businessman
* Kouichi Inoue (井上 幸一, born 1946), Japanese golfer
* Koichi Ishii (浩一, born 1964), Japanese game designer
* Koichi Kato (LDP) (born 1939), Japanese politician
* Koichi Kato (DPJ) (born 1964), Japanese politician
* Koichi Kawakita (born 1942), Japanese special effects artist
* Kōichi Kido (1889–1977), Lord Keeper of the Privy Seal of Japan during World War II
* Kōichi Kinoshita (木下 浩一, born 1967), Japanese shogi player
* Kōichi Kitamura (1931–2007), Japanese voice actor
* Kōichi Mashimo (born 1952), Japanese anime director
* Koichi Miyano (宮野 洪一, born 1942), Japanese rower
* Koichi Mizushima (born 1965), Japanese gymnast
* Kōichi Morishita (森下 広一, born 1967), Japanese long-distance runner
* Koichi Morita (songwriter)
* Koichi Murata (村田 航一, born 1996), Japanese footballer
* Koichi Nakamura (中村 光一, born 1964), Japanese video game designer
* Koichi Nakano (中野 浩一, born 1955), former professional racing cyclist and ten-consecutive-time world champion in track cycling sprint
* Koichi Nishimura (born 1973), Japanese volleyball player
* Koichi Ono (小野 光一, 1919–2000), Japanese golfer
* Kōichi Sakaguchi (坂口　候一, born 1968), Japanese voice actor
* Kōichi Satō (actor) (佐藤 浩市, born 1960), Japanese actor
* Koichi Sato (biathlete) (佐藤 幸一, born 1956), Japanese biathlete
* Koichi Sato (footballer) (佐藤 洸一, born 1986), Japanese footballer
* Koichi Sato (philatelist) (佐藤 浩一), Japanese philatelist
* Koichi Sato (ski jumper) (佐藤 耕一, born 1931), Japanese ski jumper
* Koichi Shoji (庄司浩一, 1955–2019), Japanese murderer
* Koichi Sugawara (菅原 貢一, born 1950), Japanese bobsledder
* Koichi Sugiyama (こういち; birth name 浩一, born 1931), Japanese video game composer
* Kōichi Tabuchi (田淵 幸一, born 1946), Japanese baseball player and manager
* Koichi Tanaka (born 1959), Japanese Nobel Prize winner in chemistry
* Koichi Togashi (冨樫 剛一, born 1971), Japanese footballer and manager
* Koichi Tohei (born 1920), Japanese aikido practitioner
* Kōichi Tokita (born 1961), Japanese manga artist
* Kōichi Tōchika (born 1971), Japanese voice actor
* Koichi Wakata (born 1963), Japanese astronaut
* Kōichi Yamadera (born 1961), Japanese voice actor
* Koichi Kobayashi (born 1952), Japanese Go player
* Koichi Morishita (born 1967), Japanese long-distance runner
* Amakaze Kōichi (天風 浩一, born 1991), Japanese sumo wrestler

## Fictional characters

* Kouichi Kimura, from the TV series Digimon Frontier
* Koichi Shido, from manga/anime Highschool of the Dead
* Kouichi Hayase, from manga/anime Linebarrels of Iron
* Koichi Hirose (広瀬康一), a character from the manga and anime series JoJo's Bizarre Adventure
* Koichi Zenigata, from Lupin III
* Koichi Hayama, from adult anime/game Moonlight Lady
* Koichi Hiramoto, from Wangan Midnight
* Koichi Kijima, from Wangan Midnight
* Kōichi Tanemura, a character from the anime/manga Hanasaku Iroha
* Kōichi Sakakibara, the main protagonist of the series Another
* Kōichi Sakakibara, a character from the tokusatsu Kamen Rider Ryuki Special: 13 Riders
* Koichi Kizakura, a character from the anime Danganronpa 3: The End of Hope's Peak High School
* Koichi Haimawari, a character from the manga Boku no Hero Academia
* Koichi Adachi, a character and main party member from the videogame Yakuza: Like a Dragon
* Koichi Nanase, a character from the anime Gundam Build Divers