It was supposed that he left the Sendai Domain and went to Edo, but his last name of '山南 (Sannan)' or '三南 (Sannan)' does not exist in Sendai, so this fact is unknown.
仙台藩を脱藩して、江戸に出たとされているが、仙台には山南もしくは三南という苗字はないため、確かな事は不明。