Aogashima

Island Remote volcanic island in Tokyo prefecture, small village

Aogashima, a tiny volcanic island administered from Tokyo, sits inside a double-caldera with a small, remote community. Tourists arrive by ferry or helicopter for steep-route hikes, simple guesthouses and dark-sky views.

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Aogashima is a small inhabited volcanic island in the Izu Islands chain, administratively part of Tokyo Metropolis. It is notable for its double-caldera structure and very limited, remote settlement.

The island’s main settlement sits by the shore and is served by occasional ferries and a helicopter link to the Izu mainland; services are basic and weather-dependent. A central volcanic crater contains a smaller cone and fertile slopes that are traversed by short hiking routes used by visitors and locals.

Historically Aogashima has been a small fishing and agricultural community with intermittent contact to the larger islands; its volcanic geology has shaped settlement patterns. The island remains sparsely populated and subject to volcanic monitoring.

Geographically Aogashima lies in the Philippine Sea as part of the Izu Islands, administered from Tokyo, and is several hundred kilometres south of central Tokyo in a remote oceanic setting.

  • Access restrictions: Aogashima is an inhabited volcanic island in the Izu archipelago administered by Tokyo; access is by infrequent ferry or helicopter services and subject to weather cancellations.
  • Visitor logistics: The island's volcanic caldera provides short but steep hikes and dramatic views; facilities are minimal so visitors should plan supplies and accommodation ahead.

What to See #

  • Village and port: The inhabited village cluster and port on Aogashima where the small local population live and which receives occasional ferries and helicopter services.
  • Volcanic caldera and summit cone: A central volcanic caldera with a smaller central cone inside the crater, offering hiking routes and panoramic views for visitors fit for steep terrain.
Aogashima
32.4588, 139.7662

How to Get to Aogashima #

Access is by local ferry from Hachijō-jima (irregular and weather-dependent) or by helicopter services from Tokyo/Hachijō when scheduled; bookings must be made in advance.

Tips for Visiting Aogashima #

  • Aogashima is tiny and highly weather-dependent-book boat or helicopter travel well in advance and expect cancellations.
  • Respect local rules-the island has a small community with specific arrangements for waste, lodging and limited guest capacity.
  • Bring cash; card facilities are minimal or absent.

Best Time to Visit Aogashima #

Best visited in late spring to early autumn when sea conditions are most forgiving; confirm travel plans closely with operators.

Late spring to early autumn
May-September · 18-28°C (64-82°F)
Calmer seas and more reliable boat access, though weather is always a factor in the Izu chain.

Weather & Climate near Aogashima #

Climate

Aogashima's climate is classified as Humid Subtropical - Humid Subtropical climate with hot summers (peaking in August) and cool winters (coldest in February). Temperatures range from 9°C to 28°C. Heavy rainfall (2534 mm/year), wettest in October.

Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
30°
Warmest Month
Coldest Month
Monthly Conditions

January

January is cool with highs of 15°C and lows of 10°C. Significant rainfall (130 mm) and mostly overcast skies.

56 Acceptable

Comfort

13°
Feels Like Cool
13°C
Temperature
10° 15°
72%
Humidity
Very Humid

Weather

130 mm
Rainfall
5.6 m/s
Wind
Light Breeze
0.5
UV Index
Low
10.1h daylight

February

February is the coolest month with highs of 15°C and lows of 9°C. Significant rainfall (136 mm) and mostly overcast skies.

48 Poor

Comfort

12°
Feels Like Cool
12°C
Temperature
15°
73%
Humidity
Very Humid

Weather

136 mm
Rainfall
5.5 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
10.9h daylight

March

March is cool with highs of 16°C and lows of 11°C. Significant rainfall (179 mm) and mostly overcast skies.

54 Acceptable

Comfort

14°
Feels Like Cool
14°C
Temperature
11° 16°
73%
Humidity
Very Humid

Weather

179 mm
Rainfall
5.2 m/s
Wind
Light Breeze
1.1
UV Index
High
11.9h daylight

April

April is cool with highs of 19°C and lows of 14°C. Heavy rain (203 mm) and mostly overcast skies.

54 Acceptable

Comfort

17°
Feels Like Cool
17°C
Temperature
14° 19°
76%
Humidity
Very Humid

Weather

203 mm
Rainfall
5.7 m/s
Wind
Light Breeze
1.4
UV Index
High
12.9h daylight

May

May is mild with highs of 22°C and lows of 17°C. Heavy rain (261 mm) and mostly overcast skies.

54 Acceptable

Comfort

19°
Feels Like Mild
19°C
Temperature
17° 22°
81%
Humidity
Very Humid

Weather

261 mm
Rainfall
5.0 m/s
Wind
Light Breeze
1.7
UV Index
Very High
13.7h daylight

June

June is mild with highs of 24°C and lows of 20°C. Heavy rain (325 mm) and mostly overcast skies.

64 Good

Comfort

22°
Feels Like Mild
22°C
Temperature
20° 24°
88%
Humidity
Very Humid

Weather

325 mm
Rainfall
4.5 m/s
Wind
Light Breeze
1.7
UV Index
Very High
14.1h daylight

July

July is warm with stifling humidity (dew point 24°C). Significant rainfall (168 mm) and partly cloudy skies.

72 Very Good

Comfort

25°
Feels Like Warm
25°C
Temperature
23° 27°
88%
Humidity
Very Humid

Weather

168 mm
Rainfall
4.8 m/s
Wind
Light Breeze
2.1
UV Index
Extreme
13.9h daylight

August

August is the warmest month with stifling humidity (dew point 25°C). Significant rainfall (198 mm) and partly cloudy skies.

76 Very Good

Comfort

26°
Feels Like Warm
26°C
Temperature
24° 28°
83%
Humidity
Very Humid

Weather

198 mm
Rainfall
5.0 m/s
Wind
Light Breeze
2.1
UV Index
Extreme
13.2h daylight

September

September is warm with muggy conditions (dew point 23°C). Heavy rain (259 mm) and partly cloudy skies.

70 Very Good

Comfort

25°
Feels Like Warm
25°C
Temperature
23° 27°
81%
Humidity
Very Humid

Weather

259 mm
Rainfall
5.4 m/s
Wind
Light Breeze
1.6
UV Index
Very High
12.2h daylight

October

October is mild with highs of 24°C and lows of 19°C. The wettest month with heavy rain (328 mm) and mostly overcast skies.

66 Good

Comfort

22°
Feels Like Mild
22°C
Temperature
19° 24°
77%
Humidity
Very Humid

Weather

328 mm
Rainfall
5.7 m/s
Wind
Light Breeze
1.1
UV Index
High
11.2h daylight

November

November is mild with highs of 21°C and lows of 16°C. Heavy rain (211 mm) and mostly overcast skies.

56 Acceptable

Comfort

18°
Feels Like Mild
18°C
Temperature
16° 21°
72%
Humidity
Very Humid

Weather

211 mm
Rainfall
5.1 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
10.4h daylight

December

December is cool with highs of 18°C and lows of 12°C. Significant rainfall (136 mm) and mostly overcast skies.

56 Acceptable

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 18°
72%
Humidity
Very Humid

Weather

136 mm
Rainfall
5.0 m/s
Wind
Light Breeze
0.5
UV Index
Low
9.9h daylight

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