Diving in Japan
Including Amami Oshima, Ishigaki Island (Manta Scramble), and Izu Ocean Park (Izu Peninsula). On the map.
The vibe
Descending into deep sub-tropical currents reveals dramatic underwater topography shaped by volcanic activity, where hammerheads and sea turtles cruise past ancient rock arches. Early summer to autumn delivers the clearest pelagic encounters and warmest thermal layers. The infrastructure is exceptionally polished, blending meticulous Japanese safety briefings with deeply respectful treatment of marine sanctuaries.
C-card and brief local orientation check
Amami Oshima
Kagoshima Prefecture
(c) Wich’yanan L, some rights reserved (CC BY) / Wikimedia Commons (CC BY 4.0)
A diverse subtropical diving area featuring untouched coral reefs, abundant sea turtle populations, and fascinating underwater topography. Divers also visit during winter months to hear the haunting songs of humpback whales.
Access. Accessible via flights to Amami Airport and local dive charters running from various ports on the island.
Notes. Depths range from shallow reefs to 30m drop-offs; seasonal conditions apply in winter.
Ishigaki Island (Manta Scramble)
Okinawa Prefecture
Syced / Wikimedia Commons (CC0)
Ishigaki is globally famous for reliable encounters with reef manta rays at cleaning stations like Manta Scramble. Beyond mantas, divers explore rich coral pinnacles, macro life, and dynamic channel dives.
Access. Numerous dive shops operate daily boat charters out of Ishigaki port.
Notes. Suitable for various skill levels, though outer channels can experience strong currents.
Izu Ocean Park (Izu Peninsula)
Shizuoka Prefecture
Nesnad / Wikimedia Commons (CC BY 4.0)
One of mainland Japan's most famous shore-diving areas, featuring dramatic volcanic underwater topography, steep drop-offs, and an incredible variety of temperate and migratory marine life. It is a hub for Japanese scuba culture.
Access. Easily reached by train from Tokyo followed by a short local bus or taxi to the site facilities.
Notes. Shore entry can be rugged depending on surf conditions; extensive concrete stair infrastructure is provided.
Kerama Islands
Okinawa Prefecture
TomazVajngerl / Wikimedia Commons (CC BY-SA 3.0)
Renowned for crystal-clear waters often called 'Kerama Blue', these islands offer vibrant coral reefs, dramatic underwater topography, and frequent encounters with sea turtles. Divers flock here for pristine reef gardens and thriving marine life across dozens of named spots.
Access. Easily accessible via high-speed ferry or dive boat charters from Naha, Okinawa.
Notes. Depths range from 5 to 30 meters. Currents can be moderate depending on the specific site and tide.
Mikomoto Island
Shizuoka Prefecture
Ka23 13 / Wikimedia Commons (CC BY-SA 4.0)
Famous for adrenaline-pumping drift dives where divers routinely encounter massive schools of scalloped hammerhead sharks, eagle rays, and pelagic fish. The intense oceanic currents make it a magnet for experienced thrill-seekers.
Access. Accessible via dive boats operating from Shimoda on the Izu Peninsula.
Notes. Strictly for advanced and experienced divers due to exceptionally strong, unpredictable currents.
Miyako Islands
Okinawa Prefecture
Nesnad / Wikimedia Commons (CC BY 4.0)
Famous for intricate networks of underwater limestone caverns, archways, and swim-throughs that beam dramatic shafts of sunlight into the blue. It is a premier destination for cavern and cave-style exploration in clear, shallow tropical waters.
Access. Served by numerous local dive operators based on Miyako Island.
Notes. Cavern diving requires appropriate certification or direct guidance from certified local instructors.
Ogasawara Islands
Ogasawara Subprefecture
Ootahara / Wikimedia Commons (CC0)
A remote UNESCO World Heritage site reachable only by an overnight ferry from Tokyo, offering pristine pelagic diving. Divers explore dramatic wall drops, cavernous arches, and encounter dolphins, sharks, and humpback whales in remarkably clear oceanic waters.
Access. Requires a 24-hour ferry ride from Tokyo Takeshiba Pier; local dive operators run rigid inflatable boat charters.
Notes. Remote location with advanced open-ocean conditions; strict environmental regulations apply.
Sado Island
Niigata Prefecture
まも / Wikimedia Commons (Public domain)
Located in the Sea of Japan, Sado Island offers unique temperate-water diving featuring clear visibility, dynamic rocky reefs, and vibrant marine flora and fauna distinct from tropical Japanese waters.
Access. Reached via jetfoil or car ferry from Niigata Port to Sado Island, with local dive shops on-site.
Notes. Best diving conditions run from summer through early autumn.
Yonaguni Monument
Okinawa Prefecture
Melkov / Wikimedia Commons (CC0)
Famous for its controversial and mysterious submerged rock formations, Yonaguni offers thrilling deep diving around massive geometric terraces and pillars. It is also one of the premier locations in the world to encounter massive aggregations of hammerhead sharks.
Access. Accessible by local dive boats operating out of Yonaguni Island; flights available from Naha or Ishigaki.
Notes. Advanced certification required due to strong currents, open ocean conditions, and deep profiles (15-40m+).