When I moved back to the States, I had a bunch of clothes and household goods that I didn't want to take back with me, so I asked around about how to dispose of them.

Some of the furniture went to newly-arrived gaijin. My landlady had a cousin who had just gotten divorced, so my kitchen items went to him.

An acquaintance told me that there was a Salvation Army in Japan and that they accepted donations. I went there, and sure enough, they were happy to take my unwanted clothes.