(also romanized Retu in the Kunrei-shiki system) is a Japanese word meaning "violent". Retsu is also the name of the following fictional characters: Retsu Unohana, a character from the manga and anime Bleach Retsu, a character from the game Street Fighter Retsu, the final boss from the game Final Fight 2 Retsu Seiba, one of the main characters of Bakusō Kyōdai Let's & Go!! Retsu Fukami, main character from the 2007 Japanese tokusatsu television series, Juken Sentai Gekiranger. Retsu Kaioh, one of the main characters of Baki the Grappler Japanese unisex given names