Seizansou

Seizansou (青山荘) is an inn run by Mayaka Ibara's relatives, which Houtarou and his friends visit after solving the case of Jun Sekitani. It's located near the hot springs of the Zaizen village.

Appearance
Seizansou is a U-shaped building in a traditional Japanese style. It consists of three sections including the main building (reception, the refectory and the laundry) and the two others buildings, where guest rooms are located. However, the second floor of one building is unused due to the "Room No. 7 mystery", and used as storage.

In real life
Seizansou is based on Sanso Yunosato (山荘 湯乃里) inn near the Hirayu Onsen (平湯温泉) in Oku-Hida Onsen Villages (奥飛騨温泉郷) located in,.