Sanbonsugi: The sanbonsugi hamon is characterized by a series of a few evenly spaced waves that resemble pine trees. It is frequently associated with the Aoe kind of sword-generating and is noted for its basic and elegant appearance. In 1719, Tokugawa Yoshimune, the 8th shogun from the Tokugawa shogunate, purchased Hon'ami K?ch?, who was an author