I went to the Customer service at Yamasa to get my gas bill (~¥3000), and not only did I not have to say my name, but the lady said “ちょっと待ってください”(Please wait a moment), and typed a bit on her computer.
She said that my roommate is arriving July 4th or 5th, and is from America, England, or something like that. Apparently the Taiwanese student that they had told me about in March had canceled.
Considering how infrequently I go to customer service, I find it amazing they know my face, and that she remembered that I had a roommate coming. Of course it is the end of the quarter, so anybody that has changing roommates is having that happen soon.