Manabeshima (真鍋島, Manabe-shima) is an island in the Seto Inland Sea, part of the municipality of Kasaoka, Okayama Prefecture, Japan.

The island has few roads, but in the face of rural depopulation and downward demographic trends, has managed to retain both its elementary and junior high school.

In 2016, key locations on the island were documented on Google Street View with a backpack mounted camera.

Manabeshima was the setting for the 1984 film MacArthur's Children, describing the impact of the United States' occupation of Japan from the perspective of the inhabitants of a small island community.

[2] In 2010, French cartoonist Florent Chavouet, published a travel book entitled « Manabe Shima » dedicated to the island and its inhabitants.