It is located five kilometers (3.1 mi) northeast of the island of South Iwo Jima.

[3] In 2010, the Japanese coast guard spotted steam rising one kilometer (0.62 mi) above the ocean and water discoloration of the surrounding area.

[1] In 2021, the Japan Meteorological Agency (JMA) reported that a submarine eruption occurred at Fukutoku-Okanoba volcano at 6:20 a.m. local time on August 13.

[4] On August 16, it was confirmed that a new island had formed as a result of the latest eruption.

[5] In October 2021, large quantities of pumice pebbles from Fukutoku-Okanoba damaged fisheries, tourism, the environment, 11 ports in Okinawa and 19 ports in Kagoshima prefecture.