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Toyoha mine, Minami-ku, Sapporo, Hokkaido, Japan

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Latitude & Longitude (WGS84): 42° 58' 47'' North , 141° 2' 27'' East
Latitude & Longitude (decimal): 42.98000,141.04111
Köppen climate type:Dfb : Warm-summer humid continental climate

A lead-zinc-indium-silver mine featuring the Izumo, Soya and Sorachi veins. Located 30 km SW of Sapporo, close to an active hydrothermal system (some tunnels reached temperatures of 100 C). This was until recently the world's largest indium producer (30t/yr), but closed when ore reserves were exhausted in June 2006.
One of the largest lead and zinc mines in Japan.

Genetically similar to the Pingüino deposit, Argentina.

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

56 valid minerals. 1 (TL) - type locality of valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

0 - 2.588 Ma

ID: 1382994
Quaternary volcanic rocks

Age: Pleistocene (0 - 2.588 Ma)

Comments: May include hypabyssal intrusions.

Lithology: Volcanic rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
- Encyclopedia of Minerals, 2nd. edition: 842
- Min. Jour. (Japan): 15: 222-232.
矢島淳吉, & 太田英順. (1979). Two-stage mineralization and formation process of the Toyoha deposits, Hokkaido, Japan. 鉱山地質, 29(157), 291-306.
- Kozan Chishitsu (1989), 39, 107-22.
Eijun Ohta (1991) Polymetallic Mineralization at the Toyoha Mine, Hokkaido, Japan. Mining Geology 41:279-295
- Masuta, Kenzo; Kamiki, Takashi; Narui, Eiichi (1996): Polymetallic mineralization at the Toyoha south district, Hokkaido, Japan. Shigen Chishitsu 46, 45-61.
- Ishihara, Shunso (2005): An attractive mineral resource: indium from the Toyoha Mine. Chishitsu Nyusu 605, 46-54 (in Japanese).
Ishihara, S., & Matsueda, H. (2011). Chemical characteristics of the indium-polymetallic ores from the Toyoha mine, Hokkaido, Japan. Bulletin of the Geological Survey of Japan, 62(3/4), 131-142.
Toru Shimizu,(2013) Oxygen isotopic study of vein quartz in Neogene-Quaternary overprinting hydrothermal systems in the Toyoha-Muine area, Hokkaido, Japan. Bull. Geol. Surv. Japan, vol. 64 (7/8), p. 191-200

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