Previous answer is
　BMumei (attributed to Rai Kunimitsu)
無銘 (来国光)

Features: "Rai" refers to a famous swordsmith school from Yamashiro, continuing from Kuniyoshi to Kunitsugu and Kunimitsu. Rai Kuniyuki, a descendant of Kuniyoshi, was reputed to be a craftsman originally from a foreign background, and his exceptional skills earned him the surname "Rai" from the court. During the ancient period, many skilled craftsmen from Korea and China settled in Japan, and their high level of expertise in metalworking was highly valued. Yamashiro, being in Kyoto, was renowned for producing the finest jigane for Japanese swords, indicating the superior skills and abilities of the Rai school. Some believe these craftsmen fled from invasions in China and were highly regarded in Japan for their superior skills.

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Appraisal Quiz #796 (May 25th, 2024)
Who made this sword do you think ?
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Blade Length: 68.2 cm (26.85 in)
Curvature: 1.8 cm (0.71 in)
Mekugi Holes: 2
Width at Base: 2.65 cm (1.04 in)
Width at Tip: 1.90 cm (0.75 in)
Thickness: 0.67 cm (0.26 in)
Shape: A well-proportioned tachi with a slightly slender body and solid thickness. There is rust on the mune 2 cm above the habaki.
Jigane: Itame hada with areas of mokume.
Hamon: Bright nioiguchi with small gunome midare mixed with pointed gunome. Features ashi, yo, yubashiri, and long sunagashi. The boshi is small and rounded with a slight return.

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