Super luckI am in Tokyo right now and scored a B25 in red-vermillion. We arrived Sunday evening and on Monday we went to the Takashima Shinjuku Hermes store around 11:00ish and got a bag. I'm not sure about the Ginza store but thought I'd share my experience in case you might want to try your luck at other H stores in Tokyo. My husband tried on a pair of sneakers he liked and I actually asked the SA if they had a Kelly cut or Constance. She said she would check and came back saying they had a Kelly cut in croc but that was out of our price range. So she said they had B25 in two colors I could choose from. I was carrying a Chanel bag I use for traveling so I don't think carrying an H bag is necessary. I think striking up a good conversation and hopefully connecting with the SA helps more?? Good luck and hopefully you get the B/k of your dreams!
Enjoy your new cutie