Thanks everyone! This has made packing his suitcase a lot easier.

Unfortunately though Nomad, it will only be my boyfriend going (he leaves in a few days), I have to remain in Tokyo for my job. :-( He is really looking forward to it, though a bit worried about driving around. They drive on the left in Japan, and living in Tokyo, he rarely drives. I haven't heard anybody say anything negative about San Francisco so that sounds very promising. We may end up living there one day so that is great news!