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Ichinokawa mine, Saijo City, Ehime Prefecture, Shikoku Island, Japan

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Latitude & Longitude (WGS84): 33° 53' 20'' North , 133° 13' 9'' East
Latitude & Longitude (decimal): 33.8888888889, 133.219444444
Name(s) in local language(s):愛媛県 西条市 市之川鉱山
Other regions containing this locality:Asia

Famous for its marvelous stibnite specimens, now found in museums around the world. Best specimens found in the late 19th century, during peak productivity of the mine (16,600 tons Sb produced 1875 to 1900). Closed in the 1950s. Locality labels for these specimens often under the obsolete name "Iyo province". The mine produced the antimony used in the bronze casting of the Great Buddha of Nara in 748 AD.

Simple stibnite-quartz veins cut across Cretaceous or Tertiary conglomerates and the underlying Sambagawa Belt schists and phyllites. The veins have been totally worked out, and it is hard to find even traces of stibnite here now.

Mineral List

10 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

The above list 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.


- Bancroft, P. (1988): The Ichinokawa Mine, Japan. Mineralogical Record, 19 (4), 229-238.
- Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.
- Okazaki, Y. (2012): Antimonit von Shikoku, Japan - ein historischer Fund. Lapis, 37 (11), 41 (in German).

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