In contrast with Koshin's father Shonyo (Kosho OTANI), the former Monshu who spent his young adulthood during times of war, Koshin grew up during the years of high economic growth following the war as the Shinmon (successor of the Monshu).
父であり先代門主の勝如（大谷光照）が戦時下に青年期を過ごしたのと対照的に、光真は戦後の高度成長期を新門（門主後継者）として過ごしている。