What is a four-wind game called in Japanese mahjong?
According to WWWJDIC, the word is イーチャン, or 一荘 in kanji - read as iichan (although it's unusualy in that it appears to be written in katakana, which I'm guessing could mean that it's a fairly new loanword from Chinese?). There's a JMdictDB entry on it here.