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Mitsumineyama Volcanics Kato, 1980

• Type locality: Lake Hijiriko - Ipponmatsu pass, Omi city, Higashichikuma county, Nagano prefecture
• Volcanic rocks
• Pliocene - Pleistocene

• Lithofacies (Upper): Andesite lava
• Lithofacies (Middle): Andesite volcanic breccia
• Lithofacies (Middle, Minor): Tuff, Tuffaceous sandstone
• Lithofacies (Lower): Andesite lava

• Upper limit: Unconformity (Omachi Tephra, Older Obasute Mudflow Deposit)
• Lower limit: Unconformity (Komiji Formation, Susobana Formation, Kamuriki Formation)

• Distribution: Lake Hijiriko - Ipponmatsu pass - Mount Mitsumine, Omi city, Higashichikuma county, Nagano pref.

• Kato (1980) Geology of the Sakaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)