Then, he and some former members of Kyoto-Mimawarigumi (a group that once existed to guard Kyoto City) such as Nobuo IMAI, were charged with assassination of Ryoma SAKAMOTO and Kashitaro ITO and were transferred to an inquiry office in Tokyo for interrogation on December 11, 1869.
元京都見廻組今井信郎などと共に坂本龍馬、伊東甲子太郎暗殺の嫌疑をかけられ、同年11月9日、東京の糾問所に送検されて取り調べを受けた。