| Inamba-jima | |
| Native Name: | 藺灘波島 |
| Location: | Izu Islands |
| Archipelago: | Izu Islands |
| Area Km2: | 0.005 |
| Length M: | 120 |
| Width M: | 70 |
| Elevation M: | 74 |
| Country: | Japan |
| Country Admin Divisions Title: | Prefecture |
| Country Admin Divisions: | Tokyo |
| Country Admin Divisions Title 1: | Subprefecture |
| Country Admin Divisions 1: | Miyake Subprefecture |
| Country Admin Divisions Title 2: | Village |
| Country Admin Divisions 2: | Mikurajima |
| Population: | 0 |
is a volcanic, deserted island located in the Philippine Sea approximately 220km (140miles) south of Tokyo and 35km (22miles) southwest of the volcanic Mikura-jima island, in the center of the Izu archipelago, Japan.
The island is an andesite pillar with sheer sides, the only visible portion of a submarine volcanic caldera. The above sea-level portion has a surface area of approximately 0.005 square kilometers, with a summit height of 74m (243feet). Located in the Kuroshio Current, the area has abundant sea life, and is popular with sports fishermen and scuba divers.