Ogasawara Islands (Bonnin Islands) consists over 30 islands, small and large scattered in the Pacific Ocean about 1,000 km south-southeast of Tokyo. The two largest islands of Ogasawara Islands, Chichijima and Hahajima are inhabited.

Ogasawara Islands are located in the subtropics, there is little variance in the annual range of temperature.

I received JD1BOO callsign at Hahajima with Mikio JD1BHA's great help. Hahajima is located approximately 50km south from Chichijima.