Events of the year 1612 in Japan.
Incumbents Monarch: Go-Mizunoo Shogun: Tokugawa Hidetada
Events Okamoto Daihachi incident: Intrigues involving the investiture of fiefs, along with a plot by Christian daimyo Arima Harunobu to kill Nagasaki governor Hasegawa Fujihiro, as well as a series of frauds and conspiracies by Christian daimyos further erodes the shogunate's trust in Christianity. Nagoya Castle is finished. Births N/A
Deaths June 5: Arima Harunobu, daimyo of the Shimabara Domain (b.1567) August 20: Naitō Nobunari, samurai and daimyo of Omi Province (b.1545) September 9: Nakagawa Hidenari, daimyo of Oka Domain (b.1570)
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