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Ikuno mine, Ikuno-cho-ono, Asago City, Hyogo Prefecture, Kinki Region, Honshu Island, Japan

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Latitude & Longitude (WGS84): 35° 10' 0'' North , 134° 49' 30'' East
Latitude & Longitude (decimal): 35.16667,134.82500
GeoHash:G#: wyrbh1bsd
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate
Name(s) in local language(s):生野鉱山, 兵庫県 朝来市 生野町小野

A silver mine that was first worked in 807 AD. Large scale exploitation started in 1542, using traditional methods. The Japanese government hired a French mining engineer, Francois M Coignet, to modernize the mining methods in 1868. The Mitsubishi conglomerate acquired the mine in 1896. Mining ceased in 1973, by which time the galleries had penetrated several square kilometers of ground at depths up to 1 km. Mostly flooded by 1987.
Highly telescoped xenothermal veins are hosted in Tertiary sediments and volcanics overlying Paleozoic and Mesozoic formations. Although in ancient times silver was the only metal of interest, in more modern times this mine produced a large range of other metals too, including Cu, Zn, Pb, W, Sn, As, Au, Bi, Co.
Features the Senju-hon vein, Chuo shaft, Kanagase deposit (qv), Tasei deposit (qv).
Mitsubishi Corp. still maintains a silica plant here, and the museum with the corporation's excellent mineral collection, and one section of the Kanagase deposit is open for guided underground tourism.

Mineral List

Mineral list contains entries from the region specified including sub-localities

56 valid minerals. 3 (TL) - type locality of valid minerals.

Rock Types Recorded

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Rock list contains entries from the region specified including sub-localities

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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.

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Paleogene - Cretaceous
23.03 - 145 Ma

ID: 3185777
Mesozoic-Cenozoic volcanic and intrusive rocks

Age: Phanerozoic (23.03 - 145 Ma)

Lithology: Intermediate-felsic volcanic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

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

Localities in this Region
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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)
Kato, a., & Fujiki, Y. (1969). The Occurrence of Stannoidites from the Xenothermal Ore Deposits of the Akenobe, Ikuno, and Tada Mines, Hyogo Prefecfure, and the Fukoku Mine, Kyoto Prefecture, Japan. Mineralogical Journal, 5(6), 417-433.
- Shimizu, M., Kato, A., & Matsuyama, F. (1998): Two Se-bearing Ag–Bi Sulphosalts, Benjaminite and Matildite from the Ikuno Deposits, Hyogo Prefecture, Japan –Au–Ag Mineralization in Polymetallic Zone. Resource Geology, 48, 117-124.
- Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.

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