was a Japanese swordsmith active during the Einin

Einin

was a after Shōō and before Shōan. This period spanned the years from August 1293 through April 1299. The reigning emperors were and .-Change of era:* 1298 : The new era name was created to mark an event or a number of events...

, Shōwa

Showa (first)

was a after Ōchō and before Bunpō. This period spanned the years from March 1312 through February 1317. The reigning emperor was .-Change of era:* 1311 : The new era name was created to mark an event or series of events...

 and Enkyō periods, generally acknowledged to be the teacher of master swordsmith Masamune

Masamune

, also known as , is widely recognized as Japan's greatest swordsmith. As no exact dates are known for Masamune's life, he has reached an almost legendary status. It is generally agreed that he made most of his swords in the late 13th and early 14th centuries, 1288–1328. He created swords, known as...

. This is due to various similarities in style and workmanship that indicate that Masamune was almost certainly his student.

He had several sons, who likely crafted a number of swords under his name.