Chugoku Region Lullaby ( or chà «goku chihà  no komoriuta) is a traditional folk song in Okayama Prefecture, Chugoku region, Japan, and is a well known Japanese cradle song.
The song is best known by the arrangement by Kosaku Yamada that was made in 1938. An instrumental version, played on a harp, historically marked the end of transmission at night on RCC, broadcasting to Hiroshima Prefecture. Up until 1987, a violin version was used on Sanyo Broadcasting, in Okayama and Kagawa, also signalling the end of daily programming. During the shutdown of analog television in Japan on 24 July 2011, RCC played the song for the final time on the station's analog signal shortly before the station switched off its analog transmitters.