|Comment: Fits my Masahiro Bessen 300mm Yanagi fine. It didn't come with the retaining pin, and Knife Merchant customer service informed me that Masahiro doesn't include one. You can use a toothpick or the tip of a wooden skewer, mine is carved out of a sliver of bamboo. I wish they included one, and would attach it with a string to the Saya so it doesn't get lost, as is bound to happen. So not 100% satisfied, but basically functions as advertised. A "must buy" for anyone who travels with their knife.