Why does Sakurajima has the word jima, meaning of island even though it is not an island?

2011/04/06

Sakurajima is now part of Osumi peninsula, but it was an island until the Taisho eruption in 1914.

It was 330-400m width, and 70-80m depth between Sakurajima and Osumi peninsula.
The Taisho eruption filled the gap between them with lava.

totop

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