AS25127 Katana: Mumei (Attributed to Sa Hiroyuki)(64th NBTHK Juyo Token)

Katana in Shirasaya (64th NBTHK Juyo Token)
Signature: Mumei (Attributed to Sa Hiroyuki 左弘行)

Chu-Koto: Jyo Saku: Chikuzen
We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku and Regular Saku.
This sword is ranked as Saijyo Saku among works attributed to Mumei (Sa Hiroyuki, 左弘行).

Habaki: Gold-plated double Habaki
Blade Length: 72.8 cm (28.66 in)
Curvature: 1.82 cm (0.72 in)
Mekugi Hole: 3
Width at Base (Motohaba): 3.06 cm (1.20 in)
Width at Tip: 2.65 cm (1.04 in)
Thickness of rim (Kasane): 0.42 cm (0.17 in)
Sword Weight: 855 grams
Era: mid Nanbokucho period, around Shohei era(1346)
Shape: Osuriage Mumei, wide and deep curved blade with big kissaki. Shinogi is thick and thinner toward the Mune.
Hamon: Nie-base notare with Ashi, Yo with thick Nioikuchi. Boshi is small rounded with little Hakikake.

Features: The Samonji and his disciples were active in Chikuzen in the Nanbokucho period. Hiroyuki is said to have been a swordsmith in Shohei era(1346-1370) and a son of Yukihiro. Samonji is counted among the Masamune Jittetsu, and Samonji and his disciples made beautiful jigane with Soshu-den style.
This blade is stout shaped blade with complex pattern of both jigane and Hamon showing characteristics of Samonji school.

64th NBTHK Juyo paper
Aoi Art estimation paper: Whole Oshigata