Seihoro, a building located in the town of Kusu in Oita Prefecture, was named by Futaido, a honored monk of the Shingon sect.

In the third year of the Tenpo period (1832), Kurushima Michihiro, Bungo-Mori domain 8th head, consructed Seihoro during renovation of Suehiro Shrine, according to an historical record of the Mori domain. The document says that Seihoro was a teahouse used during autumn for viewing fall leaves, and was also used at shrine festivals or parties for enjoying the moon or flowers.

The first floor of Seihoro is in teahouse style and looks onto the 'Horai-san Stone Arrangement' garden with its 'borrowed-view' of Mt Kokonoe and the Mori castle town beyond, as well as some grand stepping stones. From the second floor, there is a wonderful view, as if from a castle tower, of Mori town and Mt Kuju.

Seihoro is an important building in Kusu that tells us something about Mori domain politics in the Edo period.