High temperature veins mined since ancient times. Famous for its Japan-law quartz twinning (the original "Japan-law" locality). Old quartz specimens from here often bear the obsolete province name "Kai". In reality a group of many mines spread over several villages and mountain slopes.
Refs: Mineralogical Record: 21: 80; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1091.
For full locality listing click here. Alternatively: Click here for heirarchical list of localities in Otome mine (Mitake mine; Kurasawa mine), Yamanashi prefecture, Chubu region, Honshu Island, Japan
19 minerals listed.
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