The Japanese Hydro-electric Power Plant is a former hydroelectric power generation plant and historic site in Kolonia, the capital of Pohnpei State in the Federated States of Micronesia.

The site is historically and culturally important as a representative of three different eras in the island's history.

The site is important in the culture of Pohnpei as a location of high-quality stones gathered for use in ritual ceremonies involving the pounding of kava and drinking preparations from the plant.

Finally, in the 1920s, during the Japanese South Seas Mandate, a hydroelectric facility was built here.

When the property was listed on the United States National Register of Historic Places in 1976 (during the US-administered Trust Territory of the Pacific Islands period) the concrete power plant building and water catchment basin survived.