Correctly dated materials recorded in the “Date created” element

From Integrated Studies of Cultural and Research Resources by The National Museum of Japanese History
Ayako Shibutani, Junko Uchida, Makoto Goto, Masashi Amano, Norio Togiya, Takayuki Ako, Tsutomu Saito, Yoshihiro Okada, Wei Shi, Kosuke Kaneko, and Yuta Hashimoto