Iōjima (Kagoshima)
Island Small volcanic island in Kagoshima Prefecture, hot springs
In Kagoshima Prefecture, Iōjima is a small volcanic island with coastal hot springs, black sand beaches and local seafood-popular for day trips from Kagoshima city.
Iōjima is a small volcanic island administered from Kagoshima Prefecture in southern Japan, known for its sulfuric fumaroles and hot springs. The island’s name literally means “sulfur island” and reflects its volcanic geology.
Coastal cliffs, steaming vents and hot-spring baths are the island’s most prominent visitor attractions, and a small port settlement provides basic services. The island is modest in size and supports a small local population and fishing activity.
The island formed from volcanic activity associated with the Satsunan volcanic arc and shows clear geothermal activity today. Landscapes include rocky shorelines, steam vents and areas used for bathing and local tourism.
Iōjima lies off the southern coast of Kyushu within Kagoshima Bay and is reached by scheduled ferry services from Kagoshima city. Travel times by ferry vary depending on the service chosen.
- Volcanic features: Named Iōjima because of the island's sulfurous fumaroles; several hot-spring facilities and steam vents remain visible around the coast.
- Ferry access: Regular ferries connect the island with Kagoshima city, making day trips feasible for visitors based in the city.
How to Get to Iōjima (Kagoshima) #
Ferry services connect Iōjima with Kagoshima city and neighboring islands; schedules vary seasonally. Kagoshima’s ferry terminals and local tourist offices provide timetables and ticketing information.
Tips for Visiting Iōjima (Kagoshima) #
- Inter-island ferries in Kagoshima Prefecture vary seasonally; check local maritime timetables.
- Bring a rain jacket - the climate here is subtropical and showers can be sudden.
- If planning hikes, use local guides; some trails are unmarked and rugged.
Best Time to Visit Iōjima (Kagoshima) #
Spring and autumn offer pleasant weather for island exploration; check ferry operations and typhoon advisories during late summer.
Weather & Climate near Iōjima (Kagoshima) #
Iōjima (Kagoshima)'s climate is classified as Humid Subtropical - Humid Subtropical climate with hot summers (peaking in August) and cold winters (coldest in January). Temperatures range from 6°C to 29°C. Heavy rainfall (2530 mm/year), wettest in June.
January
January is the coolest month with highs of 12°C and lows of 6°C. Significant rainfall (146 mm), mostly overcast skies, and breezy conditions.
Comfort
Weather
February
February is cold with highs of 13°C and lows of 6°C. Significant rainfall (145 mm) and mostly overcast skies.
Comfort
Weather
March
March is cool with highs of 16°C and lows of 9°C. Significant rainfall (171 mm) and mostly overcast skies.
Comfort
Weather
April
April is cool with highs of 20°C and lows of 13°C. Heavy rain (227 mm) and mostly overcast skies.
Comfort
Weather
May
May is mild with highs of 23°C and lows of 16°C. Heavy rain (299 mm) and mostly overcast skies.
Comfort
Weather
June
June is mild with highs of 25°C and lows of 20°C. The wettest month with heavy rain (466 mm) and mostly overcast skies.
Comfort
Weather
July
July is warm with stifling humidity (dew point 25°C). Heavy rain (230 mm) and partly cloudy skies.
Comfort
Weather
August
August is the warmest month with stifling humidity (dew point 25°C). Heavy rain (219 mm) and partly cloudy skies.
Comfort
Weather
September
September is warm with muggy conditions (dew point 23°C). Heavy rain (227 mm) and partly cloudy skies.
Comfort
Weather
October
October is mild with highs of 24°C and lows of 17°C. Significant rainfall (148 mm) and partly cloudy skies.
Comfort
Weather
November
November is cool with highs of 19°C and lows of 13°C. Significant rainfall (135 mm) and mostly overcast skies.
Comfort
Weather
December
December is cool with highs of 15°C and lows of 8°C. Significant rainfall (117 mm), mostly overcast skies, and breezy conditions.
