When Eichi's lord Yoshinobu became Shogun, Eichi became Shogun's retainer and visited France as an attendant of Akitake TOKUGAWA, who was the younger brother of Yoshinobu and attended the World Exposition held in Paris as the representative of the Shogun.
主君の慶喜が将軍となったのに伴い、幕臣となり、パリで行われる万国博覧会に将軍の名代として出席する慶喜の弟徳川昭武の随員として、フランスを訪れる。