Japonski Island (Russian: Остров Японский, romanized: Ostrov Yaponskiy, Japanese: ヤポンスキー島, Tlingit: Yak'w Kashaneixí)[1] is a small island in the city of Sitka in the Alexander Archipelago of southeastern Alaska, United States.

The island's name was devised during the Russian colonial period in reference to Japanese fishermen who were stranded there in 1805 and returned to Ezo in 1806.

The term Yaponskiy is the Russian language demonym for Japanese people.

Edgecumbe High School — a state-run boarding school for rural Alaskans; the Indian Health Service regional hospital SEARHC (SouthEast Alaska Regional Healthcare Center); a United States Coast Guard air station; the port and facilities for the USCGC Kukui; and the restored boathouse maintained by the Sitka Maritime Heritage Society.

Besides the Coast Guard housing complex, there are very few Sitkans who live on Japonski Island.