The Kuroshio is a 200km wide ocean current that flows close by Yakushima. The current’s distinguishing features are its high temperature, high salinity, water clarity and it’s speed. The winter temperature of the current is an average 19.2C and this makes the winters on Yakushima considerably milder than mainland Kagoshima.  The sea temperature in the summer can rise up to 28C.

The warm waters allow coral to flourish and the swift current brings a plethora of marine life including the sea turtles that nest on the island during the summer. The current also brings the flying fish and mackerel that are main catches of the fishing industry on Yakushima. There is certainly plenty to see under the water. An annual nationwide ocean diversity survey has, on three occasions, found Yakushima to have the greatest variety of sea life in Japan.  Turtles, octopus, squid, sea snakes, a wide range of fish species and whole eco-systems of coral are what you should expect to observe while under the water.

There are several Yakushima diving companies on the island which offer a range of diving services catering from first-timers to more experienced divers. You can dive all year round, although from late spring to late autumn is the most comfortable season. The prime beach dive area on Yakushinma is Isso in the north. Expect to pay around 12,000 yen for one dive or 17,000 yen for two dives.

Beach-entry dives and boat-entry dives can be arranged.

If you have a diving qualification make sure to bring your certification.