貝合わせ

A concentration game with clamshells that started in the Heian period. It was originally called Kai-Ooi (貝覆い) and later called Kai-Awase in the Edo period. However, the word is frequently used as a slang term for "[[tribadism]]".

h4.See also

* "Wikipedia article (JP)":http://ja.wikipedia.org/wiki/%E8%B2%9D%E5%90%88%E3%82%8F%E3%81%9B 
* [[tag_group:board_games|Tag Group:Board(?) Games]]
kai-awase