Previous answer is
Mumei (Sa Sadayoshi)
無銘(左貞吉)
Special feature: Sa Sadayoshi is O-Sa’s student. He is worked at Kyushu
province but his style is different at all from other sword smith. His
sword’s Jigane and Hamon are very clear and, Chikei and Kinsuji
mixed. There are many Sa school sword smith like Yasuyoshi(Son
of O-sa), Yukihiro, Sadayoshi, Kunihiro, Hiroyuki, Hiroyasu,
Yasuyuki. All of them made sword same as their master.
The students of the students are called Sue-Sa.
==============================================
Appraisal Quiz #674 (January 15th, 2022)
Who made this sword do you think ?
==============================================
Blade length : 67.1 cm or 26.41inches.
Sori : 1.3cm or 0.51inches.
Mekugi : 2
Width at the hamachi:2.73 cm or 1.07inches.
Width at the Kissaki:1.83 cm or 1.72inches.
Kasane:0.62cm or 0.24inches.
The weight of the sword:615grams.
Shape : Osuriage with adequate thickness and broadness. Sori is slightly deep and it has longer Kissaki.
Jigane :Koitame-hada mixed with Ko-Mokume-hada, thick Jinie is attached, small Chikei works very well.
Shinogi-ji:Itamehada mixed with Mokumehada, Nagare-Masame mixes in.
Hamon :Koniedeki Suguha with deep Nioikuchi, gets brighter, Koashi is soft, Ha works well.
Boshi:Deep Nioikuchi, gets round Sori, ends with Hakigake.
================================================
Answer will be posted at next Appraisal Quiz.
================================================
(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)