Language: Japanese
Source: In common use
Description
Hon-sanmai-gitae (本三枚鍛え) is similar to the sanmai technique, with the addition of a separate, softer core piece above the edge steel.

Notes
See the tsurikomi article by the Kashima sisters. Also Markus Sesko; Encyclopedia of Japanese swords. Lulu Publishing. 2014. Page 123. (Available for purchase here.)