When a friend or neighbor’s child starts junior or senior high school, after offering their congratulations, Japanese will invariably ask, “So, which school club did he/she join?” Teenagers and club activities, commonly known as bukatsu or kurabu, go together as naturally in Japan as sushi an
Source: http://www.japantimes.co.jp/community/2014/06/22/issues/consuming-school-clubs-worry-foreign-parents/