Rai Kunitoshi, who worked in Kyōto, was among the most famous swordsmiths of the late thirteenth to early fourteenth century. This dagger, one of his masterpieces, exemplifies his best-known blade-making style.
Signature: Signed: RAI KUNITOSHI.
Pyhrr, Stuart W., Donald J. La Rocca, and Mr. Morihiro Ogawa. Arms and Armor: Notable Acquisitions 1991-2002. New York: The Metropolitan Museum of Art, September 4, 2002–June, 29 2003. p. 54, no. 51, ill.