Japan’s official territory includes 6,852 islands, of which 421 are inhabited. The inhabited remote islands (ritoh) of Japan — from the volcanic Izu-Ogasawara chain in the Pacific to the Yaeyama Islands at Japan’s southwestern edge near Taiwan — preserve fishing cultures, dialects, subtropical ecosystems, and a pace of life entirely absent from mainland Japan. Ferry travel between islands, stays at family-run guesthouses, and direct participation in island food and festival culture offer a Japan that most visitors never encounter.
The Ogasawara Islands (Bonin Islands)
The Ogasawara Islands (Father Island/Chichi-jima and Mother Island/Haha-jima) in the Pacific Ocean 1,000 km south of Tokyo are Japan’s most isolated inhabited islands — accessible only by a 25-hour ferry from Tokyo (Takeshiba pier), sailing twice monthly. UNESCO World Heritage for their endemic biodiversity (the Galapagos of the Orient), Ogasawara has 440 endemic species including the Bonin flying fox, green sea turtles nesting on beaches, humpback whale nursery waters, and forests of tree ferns found nowhere else. Dolphin swimming, whale watching (February–April), and night diving with bioluminescent plankton are signature activities.
Yakushima, Kagoshima
Yakushima is a circular mountain island 60 km south of Kyushu, with the oldest living cedar trees in Japan — Jomon Sugi is estimated at 2,170–7,200 years old and requires a 10-hour round-trip hike. The island receives 8,000–10,000 mm of rain annually, producing a moss forest of extraordinary density that inspired the landscape of Studio Ghibli’s Princess Mononoke. UNESCO World Heritage; accessible by jet ferry from Kagoshima (2 hours) or by direct flight from Osaka.
The Yaeyama Islands, Okinawa
Ishigaki Island is the transport hub of Japan’s southwestern frontier — a 3-hour flight from Tokyo with some of Japan’s most accessible coral reef diving, mangrove kayaking on Iriomote, and stargazing certified as the country’s darkest skies at Taketomi Island. Taketomi Island (15 minutes by ferry from Ishigaki) has preserved its entire village as a traditional Ryukyuan settlement with coral limestone walls, bougainvillea-covered lanes, and a complete absence of cars. Yonaguni Island, Japan’s westernmost point, is visible from Taiwan (111 km distant) on clear days and is accessible by daily flight from Ishigaki.
Practical Tips
Ogasawara ferry (Chichi-jima) departs Tokyo Takeshiba pier every 6–12 days (sailing time varies); book through Ogasawara Kaiun at least 1 month ahead. The 25-hour transit by ship is itself a Pacific experience. Yakushima Jomon Sugi trail (Arakawa trailhead) requires the trailhead bus — start no later than 5:30 am and bring full waterproofs. Taketomi traditional guesthouses fill quickly for Golden Week and summer — reserve 2–3 months ahead. Inter-island transport in the Yaeyamas uses high-speed ferries from Ishigaki (15–50 minutes per island); flexible day-trip schedules are easily combined. Japan’s remote islands require cash — ATMs with international card capability are limited.