Tottori Castle, Japanese castle ruins in Kyusho Park, Tottori, Japan.

Tottori Castle is a ruined castle on Mount Hisamatsu in Tottori, Japan, with a mountain-top section at 263 meters and lower enclosures at the foot. Long stone retaining walls of irregular grey and tan blocks, some with a battered face, support terraces such as Tenkyu-maru, enclosed by wooden post-and-rail fences. A gravel path curves below the walls, and the castle ruins stand above the city.

Tottori Castle was built in the Tenbun era on Mount Hisamatsu, and the first lord confirmed in records is Takeda Takanobu in the Genki era. In 1581 Hashiba Hideyoshi took it for Oda Nobunaga by cutting off food supplies; after four months the lord Yoshikawa Tsuneyasu killed himself and the garrison surrendered. The Ikeda clan held it through the Edo period, and in 1877 its buildings were dismantled, leaving the keep platform and stone walls.

The castle's other names, Hisamatsu Castle and Hisamatsu Mountain Castle, come from Mount Hisamatsu, the 263-meter hill where the mountain castle section stands. The grounds are now a public park, and the restored wooden main gate (Otemong) was reopened to visitors in March 2021. A bronze statue of Yoshikawa Tsuneyasu, the castle lord who surrendered in 1581, stands at the main entrance.

The climb to the ruins takes about 20 to 30 minutes from the park entrance and follows paved paths with some steep sections. Sturdy shoes are helpful because some steps are uneven and can become slippery when wet.

The Tenkyu-maru area features rare spherical stone walls that differ from the typical straight ramparts found at other Japanese fortifications. This building method was used in only a few places across Japan and draws specialists from around the world.