Kanchō (カンチョー) is a prank performed by clasping the hands together in the shape of an imaginary gun and attempting to poke an unsuspecting victim's anus, often while exclaiming "Kan-CHO!". It is a common prank among children in East Asia such as Japan, Korea, Thailand and Taiwan. In Korea it is called ttongchim (Korean: 똥침) In Taiwan, it is popularly called Qiānnián shā (Chinese: 千年殺), derived from the full Japanese name of the skill "Leaf village's secret finger jutsu: A thousand years of death" (木の葉隠れ秘伝体術奥義：千年殺し Konohakagure hiden taijutsu ōgi: Sennen Goroshi); this term derives from the popular Naruto franchise, where Kakashi Hatake uses an enhanced version of the prank on the eponymous protagonist during his ninja training.
The word is a slang adoption of the Japanese word for enema (浣腸 kanchō). In accordance with widespread practice, the word is generally written in katakana when used in its slang sense, and in kanji when used for enemas in the medical sense.
In Japan multiple people have died or been injured by having compressed air being blasted into their anus; kancho is stated to have set a cultural precedent for this phenomenon.
- Boong-Ga Boong-Ga, a video game for the Korean and Japanese market that allows the player to engage in simulated kancho.
- List of school pranks
- School bullying
- Ashcraft, Brian & Jean Snow. Arcade Mania: The Turbo-charged World of Japan's Game Centers (2008) (noting that the prank is popular among schoolchildren)
- Tomochika (31 May 2008). ""Kanchō!" wa ikite ita". Asahi Shimbun.
- Garrido, Ben. "Stranger in a strange land". Newsreview.com. Retrieved 12 March 2014.
- 「カンチョー少年の像」の躍動感がハンパない. RocketNews24 (in Japanese). Retrieved 12 March 2014.
- "癱父便秘 孝女討教遭推拿師「千年殺」 - 社會 - 自由時報電子報". news.ltn.com.tw. Retrieved 2016-03-12.
- Makihara, Kumiko (2009-07-24). "My Un-American Son". The New York Times. Retrieved 2010-05-07.
- Jake Adelstein (14 July 2018). "Man arrested for killing friend by blasting compressed air up rectum". Asia Times.