As I said before Japanese left QR Codes behind and are not coming back. The latest market survey data from MMD Labs shows that less than 2% of Japanese use QR Code payments. 4% are considering it. 50% could care less, and the rest don’t care either.
However now that there about 1.2 million Chinese living in the Tokyo-Yokohama area alone, I think Rakuten and Docomo are simply servicing their Chinese customers. It would be interesting to see if usage patterns change over time: will long-term Chinese residents drop QR in favor of Japanese FeliCa payment networks?