AS24505 Katana:Signature: Mumei (attributed to Den Cho Aritoshi)(25th NBTHK Juyo Token)

Katana in Shirasaya (25th NBTHK Juyo Token)

Signature: Mumei (transmitted as Cho Aritoshi 長有俊)

Chukoto: Jyojyo Saku: Yamato
We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku, and Regular Saku.
This piece is ranked as Saijyo Saku (highest rank) among Mumei works attributed to Den Cho Aritoshi.

Habaki: Double-layered habaki, gold plated.
Blade Length: 76.2 cm (30.00 in)
Curvature: 2.4 cm (0.94 in)
Mekugi Holes: 3
Width at Base: 2.96 cm (1.17 in)
Width at Yokote: 1.78 cm (0.70 in)
Kasane (Thickness): 0.67 cm (0.26 in)
Sword Weight: 720 grams (1.59 lbs)
Era: late Kammakura to Nanbokucho
Shape: thin and thick O-suriage blade with big curveture and small Kissaki
Jigane: Itame hada with much Jinie, Chikei and faint Utsuri.
Hamon: Ko-nie base Suguha with Ko-ashi and Sunagashi. Boshi is notare and rounded

Features: Aritoshi was a swordsmith in Yamato from Taima school. It is said that the 1st generation was active in the late Kamakura period and 2nd generation was active in the early Nanbokucho period. This blade has bright jigane with complicated grain pattern.

25th NBTHK Juyo Certificate
Aoi Art Estimation Paper
Full Oshigata