Talk:Mutsunokami Yoshiyuki/@comment-29632788-20160316055224/@comment-126.93.110.141-20160704150317

Found it!

Original thread in Japanese:

They explained with what they had in their memo when they went to the museum.

He was burnt and lost his hamon in the fire in Kushiro, Hokkaido 100 years ago, and was forged back with a straight hamon. It was explained that he had midareba hamon before the incident.

There was not much details about how or why he got to Kushiro in the first place though.