Additionally, the prefectural road (Midosuji) running in an east-west direction to the south of this building was donated to the prefecture by the Imanishi family which was inaugurated to mark the occasion of the royal visit by Emperor Meiji.
また南を東西に走る県道（御堂筋）は明治天皇ご行幸の際に県に寄贈して開通したものである。