|Native name: 初島|
|Area||0.437 km2 (0.169 sq mi)|
|Coastline||4 km (2.5 mi)|
|Highest elevation||51 m (167 ft)|
|Population||215 (29 February 2012)|
Hatsushima (初島) is an island in Sagami Bay, Japan. It is reached by ferry from the city of Atami, Shizuoka, about 10 kilometres to the north-west of the island. The population as of 2012 was 215, and the island is part of the city of Atami. A Deep Sea Observatory is located close to the island.
- Hatsushima Oceanographic Museum