1. Archaeological Research Center of Nagano Prefecture (2000) Hinatabayashi B site, Hinatabayashi A site, Nanatuguri site, and Oodaira B site. Excavation report on the sites related to the construction of Jhoshin-etsu Expressway 15. Archaeological Research Center of Nagano Prefecture, Nagano (in Japanese)
2. Habikino City Board of Education (2001) Excavation report of Suichoen site: Palaeolithic. Habikino City Board of Education, Habikino (in Japanese)
3. Hashimoto K (2006) The relationship of circular unit and axe. Palaeolithic Research 2:35–46 (in Japanese with English summary)
4. Hokkaido Archaeological Operations Center (1999) Kashiwadai 1 site: excavation report of the buried cultural property in the construction area of national highway 337, Chitose Airport. Hokkaido Archaeological Operations Center, Sapporo (in Japanese)
5. JPRA (2010) Palaeolithic sites in the Japanese Islands: a database. Japanese Palaeolithic Research Association, Tokyo (in Japanese with English summary)