Mudazumo Naki Kaikaku (ムダヅモ無き改革, Reform with No Wasted Draws, also known in English by its initial subtitle The Legend of Koizumi) is a Japanese satirical mahjong manga series by Hideki Ohwada.

The Nazis challenge the world leaders to a best-of-five mahjong match to the death on the Guiana Highlands, but the battle is interrupted by the news of a rebellion on the Moon.

A challenge is issued to Japan to send five mahjong greats to the disputed Senkaku Islands, where a mysterious "red box" is threatening the safety of nearby fishermen.

The ruling DPJ does not want to get involved in the controversy for fear of angering their Chinese masters, to the point of sending ninja assassins to try to kill Sanada, who desires to sail to the islands to investigate.

Mao cites his ambition to claim the islands for his Neo Chinese Soviet Republic and eventually reclaim China from its current leaders, who he thinks have betrayed the communist cause.

The war ends with the ambitions of the Neo Chinese Soviet Republic broken, and Koizumi and Sanada reuniting as father and son, both acknowledging each other's mahjong powers.

After a two-year hiatus since the end of the "Senkaku Islands Bloody Battle" arc, the manga resumed in 2017 with a sequel centering on the imperial princess Hako Mikado (御門葩子) playing against foreign adversaries such as American president Donald Trump.