Though Soma was scheduled to be executed on May 17, 1868 together with Kondo, thanks to Kondo, who begged for Kazue's life, he and Risaburo NOMURA, who was also captured, were spared from the execution, and they were ordered to put a rein on their own behavior under the custody of the Kasama Domain.
4月25日、近藤勇と一緒に処刑されるはずだったが、近藤の助命により、一緒に捕縛されていた野村利三郎と共に処刑を免れ、笠間藩に預けられ謹慎する。