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more, and higher resolution pictures will help.Also how many gears, what kind of fork exactly etc.
...and headtube badge picture would be nice, mostly because I suspect it would prompt you to correct the spelling to Kuwahara 🙂 Frame year and month should be stamped on the downtube near the BB in front of the serial number, might as well say when it was made in case anybody is interested.
There's a lot here which looks familiar, and if it's what I think it is you might as well put as much info out there as possible so that it goes to somebody who will appreciate a #tester_approved classic
This is not a bad place for selling geared bikes, but you'll need to give it more than 10 minutes.
And more, and higher resolution pictures will help.
Also how many gears, what kind of fork exactly etc.