Midagahara

Map of the restricted areas in case of Volcanic Alert Level 2

12Information about
Midagahara Volcano

LegendVolcano Hazard Map

Possible eruption zone

Midagahara is an andesite-dacite strato-

volcano which formed by ﬁlling in shallow

Fumarolic area

portions of the steep mountainous area

【Trekking path】

near

Road closed when Level２

Tateyama.

Road closed when Level３(1.5km radius from Jigokudani)

madeRoad closed when Level３(1.5km radius from Jigokudani)

Entrance of Raichozawa Camp Site４

Evacuation center

Boundary of towns

Direction of evacuation

summitofthehara, and Goshikigahara form plateaus【Roads】

Regulation point

Thevolcano is lost due to erosion. Midaga-

３

Emergency heliport

updeposits.

mainlyofMagmatic

pyroclasticeruptions

ﬂow

ended

several tens of thousands of years ago,

but later phreatic eruptions formed many
explosion craters to the east of Midaga-５hara, and a high fumarolic activity exists.
The volcano has been in a period of２© Japan Meteorological Agency

Toyama Prefecture
Disaster Prevention andCrisis Management Division
Tateyama Town GeneralAﬀairs Division

TEL：076-444-9670
TEL：076-463-1121

Information
ToyamaPrefectural Police
Climbing &trekking
informationTateyama
Town
Climbing &trekking
informationJapan
MeteorologicalAgency
Information ofMidagahara

ToyamaPrefectureMidagahara
VolcanoHazard Map

Issued by Tateyama Town in August, 2023

2440 Maezawa, Tateyama-machi, Nakaniikawa-gun, Toyama 930-0292
Cooperating by Midagahara Volcano Disaster Management Council
This map is based on the Digital Map published by Geospatial Information
Authority of Japan with its approval under the article30 of The Survey Act. (R 1JHs 1431)

consistedofspring activity in Jigokudani. In addition toEdo period (the 1600s to the 1800s),

deposits from several phreatic eruptions

Tengudaira Sanso-Lodge

were identiﬁed.（Excerpt from National

６

catalogue of the active volcanoes in Japan７

Murodo Terminal
11（only inside the building）
10(The Fourth Edition）)

In front ofTateyama Murodo Sanso-Lodge

Information on weather and volcanoes

Relevan t o rgani zati o ns

mainlyeruptive activity at Jigokudani during theEme r g ency co ntact

TEL：076-432-2311

activitysuch as Jigokudani, and fumaroles and hot

８Contact listToyama Local MeteorologicalObservatory

volcanic

１

９

Tateyama Town

TEL：110
TEL：119

no magma has been produced. The

phreatic explosions in explosion craters

This volcano hazard map demonstrates the danger zones ofthe diﬀerent volcanic alert levels in Midagahara and provides
the necessary information for evacuation. Hiking in themountains can be enjoyed safely by gathering suﬃcient
information and preparing your equipment in advance.

PoliceFire Department

dormancy for the past 40,000 years, and13

Volcanic Alert
Level

There are ﬁve Volcanic Alert Levels based on the disastermitigation measures required in the target area. Each level
corresponds to the action to be taken: 'Evacuate,' 'Evacuationof the elderly etc. 'Do not the volcano,' 'Do not approach the crater' and 'Be mindful that the volcano
is potentially active.' Regardless of the level, always pay attention to the information from the JMA.

119
LevelsTEL&Keyword
Level5(Evacuate)
Level4(Evacuation of theelderly etc.)

Level3(Do not approachthe volcano)Target area
Residential areas andnon-residential areas
nearer the crater
Within 2.5km radius fromJigokudani/In some cases,
within 1.5km radius from
Jigokudani

Level2(Do not approachthe crater)

Possible eruption zone

Level1(Potential forincreased activity)

In some cases, pert ofpossible eruption zone

Action to be taken by climbers

Evacuation Center
The facilities listed in the table below will aid in the smooth and quick evacuation of users in the eventof an eruption. In case of an emergency, evacuate to the nearest facility. Then, follow the instructions of
the staﬀ present at the facility.
NameNo climbing and Refrain fromentering the danger zone.

Refrain from entering thepossible eruption zone.
In some cases, it may be necessary
to refrain from entering part ofpossible eruption zone

* In Chubusangaku
National Park, walking
trails in Jigokudani havebeen closed since 2012.
* Arrows indicating
evacuation directions are
only meant to serve as aguide. In the event of aneruption, evacuate in a
direction away from thecrater.

TEL

NameTEL

１

Mikuriga-ike Onsen

076-463-1441

８

Tengudaira Sanso-Lodge

076-411-4380

２

Raichoso Lodge

076-463-1664

９

Tateyama Kogen Hotel076-463-1014

３

Raichozawa Hutte-Lodge

076-463-1835

10

Tateyama Nature Conservation
Center076-463-5401

４

Tateyama Renpo-Lodge

076-463-6004

11

Murodo Terminal

076-463-3345

５

Raichozawa Camp Site

090-1632-9141

12

Tsurugigozen Goya-Lodge

080-8694-5076

６

Hotel Tateyama

076-463-3345

13

Ichinokoshi Sanso-Lodge

090-1632-4629

７

Tateyama Murodo
Sanso-Lodge

076-463-1228

Precautions to take before
mountain hiking

Map of the restricted areas in case of Volcanic Alert Level 3[Ensure that you are in good physical condition]

Possible eruption zone

condition before hiking. If you are unwell, cancel your hike.
[Allow plenty of leeway in your plan]

Make a hiking plan with a reasonable time schedule that suits
your own physical ﬁtness.
Please arrive at your overnight spot at least two hours prior to【Roads】

Fumarolic area

Road closed when Level３(1.5km radius from Jigokudani)

Pyroclastic ﬂow & Pyroclastic surge

Road closed when Level３(2.5km radius from Jigokudani)

Lahars (Mudﬂows)

No regulations【Trekking path】

Road closed when Level３(1.5km radius from Jigokudani)sunset.

Road closed when Level３(2.5km radius from Jigokudani)No regulations

Hiking plan (Tozan Todoke)

Evacuation center

Emergency heliport

21

About 2.5km

Boundary of towns

20

ut 1.5k 12m
Abo15

Tateyama Town

responsibility. Choose a reasonable hiking route and try to hike
For safe hiking, hikers in Toyama Prefecture are required toKamiichi Town

Regulation point

Dainichi-goya

You should go hiking based on your own judgment andaccording to your experience, skill, and physical ﬁtness.

To Banbajima

LegendGet adequate sleep and ensure that you are in good physicalTo Azohara Onsengoya

Tsurugigozen Goya-Lodge

19

Fujibashi

Obashiri junction

submit a hiking plan. Please submit your hiking plan to Toyama
Prefecture or the police. If you are hiking in a group, discuss theplan with all the members. The team leader should submit the14

Tateyama Station

Shomyo Falls

hiking plan. Sharing your plan with your family and workplace
will make it possible for you to be quickly rescued in the event17of a disaster.

Evacuation CenterYou can submit aMidagahara boardwalk access

12

Tsurugigozen Goya-Lodge

18Daikanbo Station

using Compass. Please access Compass using the QR code.

13

Ichinokoshi Sanso-Lodge

19

Kuranosuke Sanso-Lodge

14

Oyama-jinjya Shrine Oﬃce 20

Tsurugisawa-goya

15

Dainichi-goya

21

Kenzan-so

16

Midagahara Hotel

22

Goshikigahara Sanso-Lodge

17

Tenbo-Tateyama-so

23

Kurobedaira Station

Q. What type of eruption could occur in Midagahara?
Eruptions that have occurred in Midagahara in the past
10,000 years have been “phreatic eruptions.” A phreaticeruption is an explosion of steam caused by the heating ofgroundwater. This hazard map was created assuming aphreatic eruption.
Q. Is there anything I should keep in mind while hiking?
Keep your smartphone or cell phone turned on to receive
emergency alerts. It is diﬃcult to obtain a signal in certain
areas, so kindly check that your device has reception.

Ballistic Projectiles
Large volcanic
projectiles, which follow
a ballistic trajectory,
oﬀer little lead time for
evacuation after thestart of an eruption.
These can cause injury
or death, and also
damage buildings.

Q. What should I do if the volcano erupts during hiking?

If the volcano erupts, immediately move away from thecrater and seek refuge in a nearby building or in the lee of arock. Protect yourself from volcanic ash and small cinders by
wearing a helmet and goggles. Try to avoid inhaling
volcanic gases by covering your mouth with a mask or wettowel.

Kurobedaira Station

23
Trailheadvicinity of theKurobe Dam

Midagahara Hotel

Toyama Univ. Tateyama Research Laboratory
Lake
KurobeToyama City

22

Volcanic phenomenas of Midagahara

Q. Are there any warning signs to indicate that the volcanois going to erupt?
The volcano could erupt without warning, so always pay
attention to the appearance of the crater. If you notice any
abnormal phenomenon, such as steam or gases being
emitted, evacuate to a safe place or descend the mountain,
and notify the authorities in Tateyama, the police, or themeteorological observatory.

16

18

Ichinokoshi Sanso-Lodge

Tozan Todoke online

Preparing for a volcanic eruption

13

Daikanbo Station© Japan Meteorological Agency

Volcanic ashand lapilli© Japan Meteorological Agency

Volcanic gases
Small volcanicprojectiles dispersed
over wide areas bywind. Even small
projectiles, it cancause injury or deathnear the crater.

© Japan Meteorological Agency

These are hightemperature gasesthat are released fromthe surface due tovolcanic activity. Theirmain components
include water, sulfur
dioxide, hydrogensulﬁde, and carbon
dioxide. Volcanic
gases are toxic andinhaling them may
adversely aﬀect thebronchial tubes andlead to poisoning.