Warmed by the Kuroshio Current, the town has a warmer and wetter climate than central Tokyo.

In the middle of the 20th century, unsuccessful attempts were made to develop silkworm farming.

Its white sandy beaches make it an excellent place to swim in summer, since it receives considerably fewer visitors than the other islands in the Izu chain.

However, winter visits are discouraged, cancellation of flights and ferries due to inclement weather can strand visitors.

Kōzushima is accessible by ferry from mainland Tokyo, Shimoda, Shizuoka, or other Izu Islands.