At least three warships of Japan have borne the name Chikuma after the Chikuma River in Nagano Prefecture: , a protected cruiser that was commissioned in 1912 and sunk as a target in 1935. , a heavy cruiser that was commissioned in 1939 and scuttled in 1944 after the Battle off Samar. , an launched in 1992 Japanese Navy ship names Imperial Japanese Navy ship names