Around two years before his death, Matsuura Takeshirō appended to his house in Kanda a one-mat room, observing that, while various one-and-a-half-mat huts had been built, this would be the first measuring only one mat. Helped by being (alternatively, around ) in height, he proceeded to live in this room for the remainder of his life. Named or , built into and adorning it were nearly a hundred old parts from temples, shrines, and historic buildings across the country, from Miyagi to Miyazaki, sent to him by his friends, the name plaque being burnt wood from the west gate of Shitennō-ji, window surrounds coming from Kōfuku-ji and Ishiyama-dera, a beam that was formerly a pillar at Kennin-ji, and other such from Byōdō-in, Daian-ji, Hōryū-ji, Kōdai-ji, Mii-dera, Tōfuku-ji, Ise Jingū, Izumo Taisha, Kasuga Taisha, Itsukushima Jina, Tsurugaoka Hachimangū, Kitano Tenmangū, Hiei-zan, Togetsu Bridge, Kumamoto Castle, even the torii from Emperor Go-Daigo's mausoleum in Yoshino. Some eighty-nine items are catalogued with illustrations and detail as to their provenance in his . His wishes that the room be cremated with him were disregarded; changing hands several times since his death, it is now preserved at the villa in the grounds of International Christian University in Tōkyō.