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Ichinosaka Tuff Himekawa Research Group 1958

• Type locality: Ichinosaka, Kinasa, Nagano city, Nagano prefecture
• Tephra
• Miocene

• Lithofacies: Felsic tuff

• Host: Tanogashira Formation

• Distribution: Ichinosaka, Kinasa, Nagano city, Nagano pref.

• Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)