In various volumes of the manga series such as Ritz Season 1, Oretachi Kenou Shineitai, Ritz Season 2, Lacross Shoujo Katagiri Ririn-san wa Totemo Moteru, and Ritz Season 3, we see world leaders including The Pope, Kim Jong Il, George W. Bush, and Japanese Prime Ministers, competing against each other in riichi mahjong matches.