Mitsunobu made efforts in constructing jinya (regional government office) and samurai residence, and in the bakufu (Japanese feudal government headed by a shogun), he also played an active role in constructing Honmaru (the keep of a castle) of Osaka-jo Castle and as Zoei Bugyo (Temple Administrator) of Enryaku-ji Temple on Mt. Hiei.
光信は陣屋や武家屋敷の建設に尽力し、幕府においても大坂城本丸普請や比叡山延暦寺の造営奉行として活躍した。