The Japanese Lighthouse, or Poluwat Lighthouse, is an abandoned lighthouse situated on Alet Island in Poluwat, Chuuk in the Federated States of Micronesia. It was completed in 1940 by the Japanese and was in use until being attacked by U.S. forces in World War II. It was listed on the National Register of Historic Places in 1983. The lighthouse is a good example of pre-World War II "marine architecture" built by the Japanese.