Any of the "fine woodworking" retailers will also have them made in various countries. They've been used for many years--not just a Japanese thing.After some research, apparently this thing is called a "kebiki" and is still sold:
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Marking gauge Kebiki with 2 blades Japan dual cutter - Osaka Tools
Small japanese Kebiki with 2 adjustable single-bevel marking blades. They leave a very fine and tear-out-free mark without tearing the grain. It can be used to cut a single line or both blades can be used in tandem to lay out a mortise or tenon. Size : 120 mm x 120 mm x 70 mm (4.7"x 4.7"x 2.7")...osakatools.com
Here is a more modern version of the same output, marking a mortise.Any of the "fine woodworking" retailers will also have them made in various countries. They've been used for many years--not just a Japanese thing.