This is an unmarked Hikari prototype direct from our source in Seki, Japan. The factory put the identifier sticker on the handle so we have left that there. The san mai blade looks spectacular! It features the traditional Japanese one hand opening and closing mechanism. It has a liner locking mechanism which is unique variation from the original design. It also has a firm ball bearing detent, keeping the blade in place when closed. A truly amazing display of craftsmanship and design.