Featured on page 66 of the Sano Art Museum "Bushi no Ishou- Sukashi Tsuba"
exhibition catalog
Featured on page 291 of the "Tosokodogu Koza" volume on tsubas
Yagyu tsuba originated with the fourth generation head of the Owari Yagyu
family, Renya, who ordered the production of tsubas which best met the Yagyu
fighting techniques.
This tsuba features a triangle and star motif which relate to the three
teachings of Buddhism around virtue, mind, and wisdom. These three elements
"Sangaku" also formed a part of Yagyu training.