Hakuunkan, Former school building in Ōmihachiman, Japan.

Hakuunkan is a former school building in Omihachiman that combines Western and Japanese architectural elements through Giyōfū style, where both traditions coexist side by side. The roof follows Japanese traditions, while the details and structural features show European influences.

The building was constructed in 1877 and represents Japan's shift toward Western teaching methods during the Meiji period. This transition from traditional to modern education shaped how the country restructured its schools.

The name Hakuunkan means "White Cloud Hall". It was built as Hachiman Higashi School, and after 1891 it served as the Hachiman town office and the Gamo district office. Today it houses a tourist information desk near the torii of Himure Hachimangu.

Hakuunkan stands directly in front of the torii gate of Himure Hachimangu. From Omihachiman Station on the JR Tokaido Main Line (Biwako Line) or the Omi Railway Yokaichi Line, take an Omi Railway bus bound for Chomeiji and get off at Hachiman-bori (Osugi-cho) Hachimanyama Ropeway-guchi, one minute on foot. The building now serves as a tourist information office.

The gable above the entrance, a curved karahafu, is topped by a taiko-drum tower on the roof; this pairing closely resembles the Kaichi School in Nagano Prefecture. The building was designed by Takagi Sakuemon, a carpenter from Gamō District in Ōmi Province.