Life in the Military Sword Era

Miyairi Yukihira was born in 1913 in Sakaki, Nagano Prefecture. As Showa Japan entered its military sword boom, most smiths adapted to industrial and mass-production methods. Miyairi instead held to traditional tamahagane and authentic forging through the entire period — a stance treated in the nihonto world as a principled rejection of industrial shortcuts.

Unwavering Commitment to Tamahagane

The quality that most defines Miyairi's reputation is his refusal to use industrial steel even when tamahagane was difficult to obtain. As traditional tatara iron smelting had declined, many smiths switched to more accessible industrial materials. Miyairi considered this "selling the soul of Japanese swords" and continued sourcing tamahagane through whatever difficulty that required. This commitment held even through wartime military sword commissions — he maintained quality over quantity while fulfilling Army orders.

Work Characteristics

Miyairi's swords are described as "pure and powerful" — prioritizing dignity over decorativeness, with well-organized itame-mokume jihada and hamon ranging from suguha to ko-midare with strong nie. The kissaki is compact and tightly formed. Post-1953 works, benefiting from renewed tamahagane access, are considered his finest.

Contribution to Tatara Revival

Miyairi's broader legacy includes his contribution to tatara smelting revival. When NBTHK began trial tatara operations in Shimane Prefecture in 1957, Miyairi's technical guidance played an important role. Turning his personal conviction into a cultural policy initiative distinguishes him among his peers.

Living National Treasure Designation and Early Death

In May 1977, Miyairi received Living National Treasure designation for nihonto craft. He died two months later at age 64. His son Miyairi Kozaemon Yukihira (Miyairi Shohei) continues forging in Sakaki today. Miyairi Yukihira's life stands as the defining symbol of a smith who preserved authentic nihonto through Japan's most difficult era.