Oyama City Museum, City museum in Oyama, Japan

Oyama City Museum is a municipal museum in Oyama, Tochigi Prefecture, opened in 1983. Its long, low building has a facade of light grey square tiles with a wide, shallow arched opening above the entrance, where a glass wall is divided by dark metal framing. Below the arch, a projecting grey stone porch bears the incised name 小山市立博物館 above glass doors. Inside are a permanent exhibition room, a special exhibition room, an experiential learning room and an audio-visual room.

The museum opened on 13 March 1983. It first also stored the city's historical-document survey materials, but in 2007 that record-keeping role passed to the newly opened Oyama City Archives. A plan exists to move the museum next to the Manda Hachimangu shrine, alongside a planned Manda no Jagamaita tradition hall.

The museum displays traditional crafts and religious objects that shaped daily life in this region. Visitors can see everyday items that reveal how local people worked and organized their communities over time.

The museum is an 8-minute walk from Mamatada Station on the JR Utsunomiya Line. The O-Bus Watarase Line from the station's west exit stops at "City Museum Entrance", but runs only four times a day. It closes on Mondays, the day after holidays, and the fourth Friday of each month.

The museum holds particularly valuable items from the Edo period that show how people in this region lived and worked. This collection offers a direct window into communities and their everyday realities from centuries past.