Tamasaki-jinja, Shinto shrine in Japan

Tamasaki-jinja is a Shinto shrine in the Iioka district of Asahi, Chiba Prefecture, Japan. Its main hall is a one-bay nagare-zukuri structure built in the Genroku era (1688–1704) and noted for its carving; the worship hall dates from the Tenpō era (1830–1844). Both are Chiba Prefecture designated tangible cultural properties, and a pair of old Seto ware komainu is likewise designated.

The shrine was established to honor Tamayorihime and has served as a center for local traditions over many generations. It suffered destruction from fires and was rebuilt several times, with the most recent major reconstruction occurring in the late 1600s.

The shrine is dedicated to Tamayorihime, a goddess in Shinto belief. Visitors can observe locals leaving coins and bowing before the altar, showing how the place serves as a center for community prayer and daily spiritual customs.

Take a bus bound for Futaba-machi from JR Sobu Main Line Asahi Station and get off at the Tamasaki-jinja stop, one minute on foot; from Iioka Station the trip is by taxi. The shrine stands in the Iioka district of Asahi, Chiba, in the former Shimousa province Kazusa-gun area.

The shrine's name changed from Tamasaki Daimyojin to Tamasaki-jinja in the Meiji era. Its former rank was a gosha, and in 1906 Chiba prefecture designated it a shrine receiving heihaku offerings. The wooden plaque in the worship hall is attributed to Tokugawa Yoshimune, granted after a bountiful fishing catch in 1729.