Try glass blowing or shop hand-crafted pieces. Sparkly, photogenic souvenirs.

The Stained Glass Museum is a small, intimate spot where you can admire beautifully lit historical and contemporary panels, so plan for about 30 to 45 minutes and visit in daylight to see the windows at their best. Photography is usually fine if you avoid flash, but expect most signs and tours to be in Japanese, so bring a translation app or a phrasebook. It sits off the main tourist routes, so double check opening days and times, bring some cash for admission, and allow extra time for local bus connections or limited parking if you drive.