Mudazumo Naki Kaikaku

Modern diplomacy is settled through high-stakes games of mahjong in this cult classic starring a fictionalized Prime Minister Junichirō Koizumi. First serialized in Kindai Mahjong magazines, the 16-volume series pits Koizumi against caricatured world leaders including George W. Bush, Kim Jong-il, Vladimir Putin, Margaret Thatcher, and others.

(Source: Mahjong Pros)

Included one-shots:
Volume 3: Ritz season.1
Volume 4: Oretachi Kenou Shineitai
Volume 11: Ritz season.2
Volume 12: Lacross Shoujo Katagiri Ririn-san wa Totemo Moteru
Volume 13: Ritz season.3