Sukemitsu, who signs with the characters 佐光, is known through a signed Bishu Sukemitsu in six characters, designated at the 48th session in 2002. The published sources note that the list six generations of the name, from a first generation around Koan in the mid- period down to Eisho. Judging from the workmanship and the style of the signature, they place this with one of them: 「光弘門・永和頃という南北朝後期に活躍した小反りの刀工に該当するものと考えられる」, a smith of the Mitsuhiro line, active in the late period around Eiwa (1375 to 1379).
The is with an , somewhat wide, with a clear taper from base to tip, a narrow for its width, a rather thick , a high and a ; the published sources call it a powerful form. Its is mixed with and , standing overall, with fine , dark -like steel and a faint -like effect. The temper is based on , mixed with , , angular and into a small-patterned whole, with and , , along the edge in places, vigorous and . The is , turning back with a feeling and showing . The tang is slightly shortened, with three peg holes.
The published sources read the blade as characteristic of its time and group: 「地刃の様相に南北朝後期の小反りの特色が顕著である」 (the and clearly show the features of late work), and they find the same character in the fine with dark -like steel. They also see a step forward in the temper on the , where a slight appears: 「腰びらき風を見せる刃取りには、応永備前への移行を予感させるものがある」 (it anticipates the transition toward Oei ).
With its , , and , the published sources call it 「総体に覇気に充ちた一口である」 (a blade filled with spirit throughout), and they value it as documentary evidence besides, 「同工の作域を知る上で資料的にも貴重である」 (precious as material for understanding this smith's range of work).