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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 43.453°N
  • 143.036°E

  • 2013 m
    6603 ft

  • 285061
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Maruyama.

The Global Volcanism Program has no Weekly Reports available for Maruyama.

The Global Volcanism Program has no Bulletin Reports available for Maruyama.

Basic Data

Volcano Number

Last Known Eruption



1898 CE

2013 m / 6603 ft


Volcano Types

Lava dome(s)

Rock Types

Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone
Continental crust (> 25 km)


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

The Nipesotsu-Maruyama volcano group, located west of Nukabira lake about 20 km east of Tokachidake volcano, is composed of a number of overlapping andesitic-to-rhyolitic stratovolcanoes and lava domes constructed along a NW-SE trend. These volcanoes overlap the SW rim and SW caldera floor of the Pleistocene Tokachimitsumata caldera. The highest peak in the complex is 2013-m-high Nipesotsuyama stratovolcano, which was active during the mid-Pleistocene, about 0.4-0.2 million years ago. The Maruyama stratovolcano and lava dome at the southern end of the complex was discovered to be a Quaternary volcano only in 1989. It is also referred to as Higashi-Tokachi-Maruyama to distinguish it from several other volcanoes named Maruyama, which means "Round Mountain." A minor phreatic eruption took place at Maruyama lava dome in 1898, and fumaroles are present on one of its summit craters.


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Hasegawa T, Ishii E, Nakagawa M, 2008. Correlations of distal ash layers in the Akan pyroclastic deposits, eastern Hokkaido, with large-scale pyroclastic flow deposits distributed in central Hokkaido, Japan. J Geol Soc Japan, 114: 366-381 (in Japanese with English abs).

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Ishii E, Nakagawa M, Saito H, Yamamoto A, 2008. The Pleistocene Tokachimistumata caldera and associated pyroclastic flow deposits in central Hokkaido, Japan: correlation of large-scale pyroclastic flow deposits with source calderas. J Geol Soc Japan, 114: 348-365 (in Japanese with English abs).

Japan Meteorological Agency, 2013. National Catalogue of the Active Volcanoes in Japan (fourth edition, English version). Japan Meteorological Agency.

Japan Meteorological Agency, 1996. National Catalogue of the Active Volcanoes in Japan (second edition). Tokyo: Japan Meteorological Agency, 502 p (in Japanese).

Kudo T, Hoshizumi H, 2006-. Catalog of eruptive events within the last 10,000 years in Japan, database of Japanese active volcanoes. Geol Surv Japan, AIST,

Nakano S, Yamamoto T, Iwaya T, Itoh J, Takada A, 2001-. Quaternary Volcanoes of Japan. Geol Surv Japan, AIST,

Volcanological Society of Japan, 1960-96. Bull Volc Eruptions, no 1-33. [Annual reports issued 1 to 3 years after event year, published since 1986 in Bull Volc].

Eruptive History

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1898 Dec 3 (?) 1898 Dec 6 Confirmed 2 Historical Observations Maru-yama (No. 1 crater)
1700 BCE (?) Unknown Confirmed 2 Radiocarbon (corrected) Maru-yama, My-b tephra

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Feature Name Feature Type Elevation Latitude Longitude
Kotengu-dake Stratovolcano
Stratovolcano 2013 m 43° 27' 12" N 143° 2' 10" E
Tengu-dake Stratovolcano


Feature Name Feature Type Elevation Latitude Longitude
Tokachimitsumata Pleistocene caldera


Feature Name Feature Type Elevation Latitude Longitude
Gunkan-yama Dome 1181 m 43° 28' 47" N 143° 6' 49" E
Dome 1692 m 43° 25' 3" N 143° 1' 52" E
Upepesanke Dome 1836 m 43° 23' 0" N 143° 6' 0" E


Feature Name Feature Type Elevation Latitude Longitude
Horoka Thermal 700 m
Nukabira Thermal 600 m

Photo Gallery

Hydrothermally altered rocks in the crater of Maru-yama lava dome are seen in the foreground of this aerial view from the NE. Maru-yama, which had a minor phreatic eruption in 1898, is part of the Nipesotsu-Maruyama volcano group, located in central Hokkaido east of Tokachi-dake volcano. The volcano group is composed of a number of overlapping andesitic-to-dacitic stratovolcanoes and lava domes along a NW-SE trend.

Photo by Yukio Hayakawa, 1990 (Gunma University).
Cross-country skiers in the saddle between Nipesotsu-dake stratovolcano and Maru-yama lava dome approach the south side of 2013-m-high Nipesotsu volcano. The Nipesotsu-Maruyama volcano group, located east of Tokachi-dake volcano, is composed of a number of overlapping andesitic-to-dacitic lava domes constructed along a NW-SE trend. A minor phreatic eruption took place at Maru-yama lava dome in 1898, and fumaroles are present on one of its summit craters.

Copyrighted photo by Yoshihiro Ishizuka, 1998 (Japanese Quaternary Volcanoes database, RIODB, and Geol Surv Japan, AIST,

Smithsonian Sample Collections Database

There are no samples for Maruyama in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites

Large Eruptions of Maruyama Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.