Ōsumi-shotō

Islands Archipelago south of Kyushu noted for volcanic islands

Archipelago south of Kyushu in Kagoshima whose islands include Tanegashima and Yakushima; visitors come for subtropical beaches, ancient cedar forests, diving and the Tanegashima space centre.

Main image
Osumi Islands ISS045.jpg
Osumi Islands.jpg
Main image

Ōsumi-shotō (the Ōsumi Islands) are a chain of islands in Kagoshima Prefecture, south of Kyushu in southern Japan. The group forms part of the Satsunan Islands and includes several inhabited and uninhabited islands under Kagoshima administration.

The islands vary from low-lying coral and volcanic isles to larger, forested islands with rugged interior terrain. Key visitor attractions include the Tanegashima Space Center on Tanegashima and the ancient cedar forests and mountain scenery of Yakushima.

The archipelago has a volcanic origin and has been inhabited and used for fishing, agriculture and more recently tourism and space-related activities on Tanegashima. The islands are connected to Kyushu by ferry and air services on scheduled routes.

The Ōsumi Islands lie off the southeastern coast of Kyushu in Kagoshima Prefecture and are part of Japan’s southern island system, accessible from Kagoshima city and other regional transport hubs.

  • Major islands: Includes Tanegashima, which hosts Japan's Tanegashima Space Center, and Yakushima, known for its ancient cedar forests and strong conservation protections.

What to See #

  • Tanegashima Space Center: A paced launch and research facility used for Japanese space launches, located on one of the chain's largest islands.
  • Yakushima: A largely forested island noted for ancient cedar forests, mountains and significant natural conservation status recognized internationally.
Ōsumi-shotō
Ōsumi Islands (Ōsumi‑shotō), Kagoshima Prefecture, Japan
30.6091, 130.1833

How to Get to Ōsumi-shotō #

Ōsumi-shotō (the Ōsumi Islands) are reached from Kagoshima Prefecture. Depending on which island you are visiting, travel options include ferries from Kagoshima Port and other local ports or short domestic flights to island airports that exist on some islands; schedules and durations vary by island. From Kagoshima city center the ports and airports are the usual departure points for ferries and flights.

Tips for Visiting Ōsumi-shotō #

  • Check ferry and flight timetables from Kagoshima port well before travel-inter-island services to the Ōsumi islands (including Yakushima, Tanegashima and smaller isles) run on limited schedules and often require reservations, especially in high season.
  • Avoid the typhoon season (typically summer-early autumn) when sea links can be canceled; if you need a firm return time, book overnight stays on the island rather than attempting a day trip dependent on weather.
  • If you're targeting a specific island activity (turtle watching on Tanegashima, Yakushima hiking), confirm local transport and lodging in advance-services on smaller islands are limited and day‑of coordination can be difficult.

Best Time to Visit Ōsumi-shotō #

Best visited in spring or autumn to avoid the hot, humid rainy/typhoon season.

Spring (pleasant)
March-May · 18-25°C
Mild, pleasant weather for island hopping and outdoor exploration with lower humidity than summer.
Autumn (stable & warm)
October-November · 20-25°C
Warm, comfortable conditions and often a good time to visit with reduced chance of typhoons compared with late summer.
Summer (hot, rainy, typhoon season)
June-August (typhoon risk into September) · 25-33°C
Hot and humid with a pronounced rainy season; increased risk of typhoons from late summer into early autumn can disrupt travel.

Weather & Climate near Ōsumi-shotō #

Climate
Temperature & Rainfall
Temperature Range
31°
Warmest Month
Coldest Month
Monthly Conditions

January

Weather

0.5
UV Index
Moderate
10.3h daylight

February

Weather

0.8
UV Index
Moderate
11.0h daylight

March

Weather

1.1
UV Index
High
11.9h daylight

April

Weather

1.4
UV Index
High
12.8h daylight

May

Weather

1.6
UV Index
Very High
13.6h daylight

June

Weather

1.5
UV Index
Very High
13.9h daylight

July

Weather

2.1
UV Index
Extreme
13.8h daylight

August

Weather

2.1
UV Index
Extreme
13.1h daylight

September

Weather

1.6
UV Index
Very High
12.2h daylight

October

Weather

1.1
UV Index
High
11.3h daylight

November

Weather

0.7
UV Index
Moderate
10.5h daylight

December

Weather

0.5
UV Index
Low
10.1h daylight

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