Thank you from me too. The tool is fantastic. It would be nice if:
a) I could send a feature request via the interface. :D
b) I could filter search results by length, weight, etc parameters. Some of the items don't have this, but some do and for myself this is quite crucial information. For example, I would love to see items that are Koto, longer than 2.5 shaku and under 800 grams (blade). Even if this would not be quite fool proof thanks to missing info, it would help to limit the many options and there could always be a toggle like "Show items without corresponding information: Y/N".