Mount Aka (Yatsugatake)

Mountain Prominent Yatsugatake peak known for alpine scenery

A prominent peak in the Yatsugatake range, used for day hikes and alpine scrambling; visitors seek ridge walks, seasonal wildflowers and wide mountain views.

Main image
Akadake.jpg
Dryas octopetala var. asiatica and Mount Aka.jpg
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Mount Aka (53108797993).jpg
Mount Aka (Yatsugatake) (53108797813).jpg
Mount Aka - Flickr - 雷太.jpg
Prunella collaris erythropygia s4.jpg
Prunella collaris erythropygia s5.jpg
満月に照らされた赤岳 右の光点は赤岳展望荘 Pcs34560 IMG31838.jpg
赤岳の山頂に落ちていく太陽 Pcs34560 IMG29182.jpg
Mount Aka (Yatsugatake)
35.9667, 138.3667

How to Get to Mount Aka (Yatsugatake) #

Reachable from Chino or other Yatsugatake-area towns by bus to trailheads; nearest rail access typically requires a short bus or taxi ride to the mountain’s trailhead.

Tips for Visiting Mount Aka (Yatsugatake) #

  • Start early to avoid afternoon thunderstorms typical of Yatsugatake peaks.
  • There are multiple routes; the Akadake trail is popular and signposted - study the trailhead information before setting out.
  • Use mountain huts responsibly - they provide shelter but require bookings in high season.

Best Time to Visit Mount Aka (Yatsugatake) #

Best visited in summer for hiking and autumn for colours; avoid winter without mountaineering experience.

Summer
Jun-Aug · 10-25°C
Warm days and accessible trails; wildflowers at lower elevations.
Autumn
Sep-Nov · -5-15°C
Crisp air and vivid autumn colours; mornings can be foggy.

Weather & Climate near Mount Aka (Yatsugatake) #

Climate

Mount Aka (Yatsugatake)'s climate is classified as Subarctic - Subarctic climate with cool summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -15°C to 17°C. Heavy rainfall (2222 mm/year), wettest in August.

Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
33°
Warmest Month
-19°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of -5°C and lows of -15°C. Moderate rainfall (55 mm), partly cloudy skies, and breezy conditions.

39 Poor

Comfort

-10°
Feels Like Freezing
-10°C
Temperature
-15° -5°
88%
Humidity
Very Humid

Weather

55 mm
Rainfall
6.9 m/s
Wind
Breezy
0.4
UV Index
Low
9.9h daylight

February

February is freezing with highs of -5°C and lows of -15°C. Moderate rainfall (74 mm), partly cloudy skies, and breezy conditions.

37 Poor

Comfort

-10°
Feels Like Freezing
-10°C
Temperature
-15° -5°
85%
Humidity
Very Humid

Weather

74 mm
Rainfall
7.3 m/s
Wind
Breezy
0.6
UV Index
Moderate
10.8h daylight

March

March is freezing with highs of -2°C and lows of -12°C. Significant rainfall (123 mm), partly cloudy skies, and breezy conditions.

33 Poor

Comfort

-7°
Feels Like Freezing
-7°C
Temperature
-12° -2°
80%
Humidity
Very Humid

Weather

123 mm
Rainfall
6.5 m/s
Wind
Breezy
0.9
UV Index
Moderate
11.8h daylight

April

April is freezing with highs of 5°C and lows of -6°C. Significant rainfall (177 mm), partly cloudy skies, and breezy conditions.

38 Poor

Comfort

Feels Like Freezing
C
Temperature
-6°
76%
Humidity
Very Humid

Weather

177 mm
Rainfall
7.3 m/s
Wind
Breezy
1.2
UV Index
High
13.0h daylight

May

May is cold with highs of 10°C and lows of -1°C. Significant rainfall (200 mm), mostly overcast skies, and breezy conditions.

42 Poor

Comfort

Feels Like Cold
C
Temperature
-1° 10°
75%
Humidity
Very Humid

Weather

200 mm
Rainfall
6.6 m/s
Wind
Breezy
1.5
UV Index
High
13.9h daylight

June

June is cold with highs of 13°C and lows of 4°C. Heavy rain (287 mm) and mostly overcast skies.

42 Poor

Comfort

Feels Like Cold
C
Temperature
13°
80%
Humidity
Very Humid

Weather

287 mm
Rainfall
5.9 m/s
Wind
Light Breeze
1.5
UV Index
High
14.4h daylight

July

July is cool with highs of 16°C and lows of 8°C. Heavy rain (299 mm) and mostly overcast skies.

52 Acceptable

Comfort

12°
Feels Like Cool
12°C
Temperature
16°
83%
Humidity
Very Humid

Weather

299 mm
Rainfall
5.2 m/s
Wind
Light Breeze
1.6
UV Index
Very High
14.1h daylight

August

August is cool with highs of 17°C and lows of 9°C. The wettest month with heavy rain (365 mm) and mostly overcast skies.

54 Acceptable

Comfort

13°
Feels Like Cool
13°C
Temperature
17°
82%
Humidity
Very Humid

Weather

365 mm
Rainfall
5.5 m/s
Wind
Light Breeze
1.7
UV Index
Very High
13.3h daylight

September

September is cold with highs of 14°C and lows of 6°C. Heavy rain (313 mm) and mostly overcast skies.

46 Poor

Comfort

10°
Feels Like Cold
10°C
Temperature
14°
84%
Humidity
Very Humid

Weather

313 mm
Rainfall
5.6 m/s
Wind
Light Breeze
1.3
UV Index
High
12.3h daylight

October

October is cold with highs of 8°C and lows of -1°C. Significant rainfall (174 mm) and partly cloudy skies.

40 Poor

Comfort

Feels Like Cold
C
Temperature
-1°
85%
Humidity
Very Humid

Weather

174 mm
Rainfall
5.4 m/s
Wind
Light Breeze
0.9
UV Index
Moderate
11.2h daylight

November

November is freezing with highs of 4°C and lows of -6°C. Significant rainfall (102 mm), partly cloudy skies, and breezy conditions.

46 Poor

Comfort

-1°
Feels Like Freezing
-1°C
Temperature
-6°
85%
Humidity
Very Humid

Weather

102 mm
Rainfall
6.5 m/s
Wind
Breezy
0.5
UV Index
Moderate
10.2h daylight

December

December is freezing with highs of -2°C and lows of -12°C. Moderate rainfall (53 mm) and breezy conditions.

45 Poor

Comfort

-7°
Feels Like Freezing
-7°C
Temperature
-12° -2°
87%
Humidity
Very Humid

Weather

53 mm
Rainfall
6.5 m/s
Wind
Breezy
0.4
UV Index
Low
9.7h daylight

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