Unu Glanta Shimokitazawa, Tokyo

Cute boutique jewelry store specializing in sterling silver. Lots of amazing styles,and the best part is they can adjust the finish to your taste - from super polished to matte. Of course, they can size just about any piece to fit you perfectly.

Staff are super sweet!

There are several locations, and I read that they have a jewelry making class you can take to design and make your own piece. Check to see which locations have the classes.