Kyū Hosokawa Gyōbutei, Samurai residence in Kumamoto Castle Park, Japan

The Kyū Hosokawa Gyōbutei is a former samurai residence with traditional Japanese wooden architecture located in Kumamoto Castle Park. The rooms feature tatami mats and are organized into sections for daily living and formal entertaining.

The Hosokawa Gyōbu family, a branch of the Hosokawa clan, established its residence in 1678 in the Kogai district of Kumamoto. In 1873 the family made it their main house after samurai residences were moved out of the castle. The building was relocated to its current site in the San-no-maru area of Kumamoto Castle in 1993 and designated an important cultural property in 1985.

The residence takes its name from the Gyōbu post held by several heads of the Hosokawa-Gyōbu branch, also called the Kogai-Hosokawa. From the second head, Nagaoka Okiyuki, the family used the surname Nagaoka. The compound includes a tea house, Kansen-tei, with an attached study, a treasure store and a kitchen, showing the range of activities in an upper-class samurai household.

The residence sits at 3-1 Furukyo-machi in Chūō-ku, on the site of the former Ninomaru Goten in the Sannomaru area of Kumamoto Castle. It closed after the April 2016 Kumamoto earthquake, and repair and seismic reinforcement work is scheduled to finish with public reopening in fiscal 2028. A limited opening was held from 17 November to 3 December 2023. A combined ticket with Kumamoto Castle is available, but group discounts do not apply to it.

The residence was moved from Higashi-Kogoshi-machi to the Ninomaru Goten site in Sannomaru in 1993, not returned to its original location. In 2015 a typhoon toppled about 70 metres of its surrounding wall, and the 2016 Kumamoto earthquake damaged plaster and roof tiles; it is closed for restoration and seismic reinforcement, with reopening planned for fiscal 2028.