Ōchi (相知町, Ōchi-chō) was a town located in the Higashimatsuura District of Saga Prefecture, Japan.
On January 1, 2005, Ōchi, along with the towns of Chinzei, Hamatama, Hizen, Kyūragi and Yobuko, and the village of Kitahata (all from Higashimatsuura District), were merged into the expanded city of Karatsu.
The Warabino terraced rice fields, said to be the highest in Japan, are located on the northern slopes of Mount Hachimandake in Ōchi.
Beginning on the 3rd Friday of October each year the town has a weekend in which there are a series of parades, day and night, where children and adults pull two large floats and dress in period costumes with much music and lively chanting.
These days the mine site has been transformed into Ōchi park, the Saga Royal golf course, and a sports complex.