A jinbei (甚平?), alternately jinbē (甚兵衛?) or hippari (ひっぱり?), is a kind of traditional Japanese clothing worn by men, women, boys, girls, and even babies during the summer. Women's jinbei have started to become popular in recent years.
Jinbei are usually worn as a form of nightwear or house wear. Normally, male Japanese would wear jinbei only within their own homes, or outside the home when in close proximity to it (for example, to collect the mail or go on a local errand, or sometimes even while shopping or dining at a local restaurant). Sometimes jinbei are used as substitute for yukata during a summer festival, typically by men and boys but also frequently by young women. Ladies' jinbei tend to be more brightly coloured and often feature prints of popular culture characters and motifs.
The whale shark is also known as jinbei-zame (ジンベイザメ(甚平鮫)?, "jinbei shark") or jinbē-zame (ジンベエザメ 《甚兵衛鮫》?, "jinbee shark") in Japanese due to its skin patterns resembling those of jinbei.