Koichiro

Kōichirō, Koichiro, Kouichirou or Kohichiroh is a masculine Japanese given name.

Possible Writings

 * 晃一郎, "clear, one, son"
 * 光一郎, "light, one, son"
 * 弘一郎, "vast, one, son"
 * 鴻一郎, "prosperous, one, son"
 * 紘一郎, "large, one, son"
 * 浩一郎, "vigorous, one, son"
 * 耕一郎, "till, one, son"
 * 航一郎, "navigate, one, son"
 * 倖一郎, "happiness, one, son"
 * 孝一郎, "filial piety, one, son"
 * 興一朗, "entertain, one, serene"
 * 紘一朗, "large, one, serene"
 * こういちろう in hiragana
 * コウイチロウ in katakana

People

 * Kōichirō Asakai (朝海 浩一郎), Japanese politician
 * Kōichirō Genba (玄葉 光一郎), Japanese politician
 * Koichiro Harada (原田 耕一郎), Japanese mathematician
 * Koichiro Hirayama (平山 紘一郎), Japanese sport wrestler
 * Kōichirō Hoshino (星野 倖一郎), Japanese manga artist
 * Koichiro Ichimura (市村 浩一郎), Japanese politician
 * Koichiro Katafuchi (片渕 浩一郎), Japanese footballer
 * Koichiro Kawano (河野 晃一郎), Japanese golfer
 * Koichiro Kimura (木村 浩一郎), Japanese mixed martial artist
 * Koichiro Koga (古賀 幸一郎), Japanese volleyball player
 * Kōichirō Matsuura (松浦 晃一郎), Japanese diplomat
 * Koichiro Mitani (三谷 浩一郎), Japanese judoka
 * Kōichirō Morioka (森岡 紘一朗), Japanese racewalker
 * Koichiro Muroya (室屋 光一郎), Japanese violinist and violist
 * Koichiro Nagatomo (長友 耕一郎), Japanese footballer
 * Koichiro Nishi (西 興一朗), Japanese actor
 * Kōichirō Nishikawa (西川 公一郎), Japanese particle physicist
 * Koichiro Okuma (born 1970), Japanese instructor of Shotokan karate
 * Koichiro Shima (嶋 浩一郎), Japanese creative director
 * Koichiro Shimizu (清水 鴻一郎), Japanese surgeon and politician
 * Kōichirō Tomita (冨田 弘一郎), Japanese astronomer
 * Kōichirō Uno (宇能 鴻一郎), Japanese writer
 * Kōichirō Yasunaga (安永 航一郎,), Japanese manga artist
 * Kōichirō Yuzawa (湯澤 幸一郎), Japanese actor

Koichirō or Koichirou (written: 小一郎) is a separate given name, though it may be romanized the same way. Notable people with the name include:
 * Kawada Koichiro (川田 小一郎), Japanese businessman and banker
 * Tachibana Koichirō (立花 小一郎), Japanese general

Fictional characters

 * Kōichirō Endo (遠藤 耕一郎), a character in the tokusatsu series Megaranger
 * Kōichirō Kashima (鹿島 耕一郎), a character in the manga series All Out!!
 * Koichirō Marito (鞠戸 孝一郎), a character in the anime series Aldnoah.Zero
 * Kouichiro Sako (佐古 浩一郎), a character in the anime series Stratos 4
 * Kōichirō Tanba (丹波 光一郎), a character in the manga series Ace of Diamond
 * Kōichirō Takasugi (高杉 光一郎), a character in the anime series Da-Garn
 * Kōichirō Nangou (南郷 洸一郎), a character in the anime series Slam Dunk
 * Kōichirō Iketani (池谷 浩一郎), a character in the manga series Initial D