Introducing Ignatius Trebitsch-Lincoln. He had a pretty amazing career and history, and towards the end there were some Japan links.
He ended up in China, where he took up employment under three different warlords including Wu Peifu. Supposedly after a mystic experience in the late 1920s, Trebitsch converted to Buddhism, becoming a monk. In 1931 he rose to the rank of abbot, establishing his own monastery in Shanghai. All initiates were required to hand over their possessions to Abbot Chao Kung,(Ch. 照空 pinyin: Zhào Kōng) as he now called himself, who also spent his time seducing nuns.
In 1937 he transferred his loyalties yet again, this time to the Empire of Japan, producing anti-British propaganda on their behalf. Chinese sources say the opposite, that he wrote numerous letters and articles for the European press condemning Japanese imperial aggression in China.
Hopefully, other posters have more examples to share.
