Talk:Mikazuki Munechika/@comment-25170255-20150713120621/@comment-28053036-20150713123316

"In swordsmithing, hamon (刃文) (from Japanese, literally "blade pattern") is a visual effect created on the blade by the hardening process."

You can read more about it here: https://en.wikipedia.org/wiki/Hamon_(swordsmithing)