During the Kyoho era, the eighth Tokugawa shogun Yoshimune — remembered for the Kyoho Reforms that emphasized personal rulership and economic development — encouraged falconry in the Edo suburbs and had 'Kosuge Palace' built as a falconry rest-stop on what is now the Kosuge Jinja precinct (then the villa of the Ina family, Kanto magistrates). For Yoshimune, falconry was not mere recreation but a policy instrument combining martial training, field inspection of the populace, and suburban forestry management. The ninth shogun Ieshige also used the palace on his hunts. The palace grounds are now occupied by the Tokyo Detention Center, but a corner survives within the shrine precinct, making this one of the few sites preserving Tokugawa shogunal falconry culture.