I just come back from Japan today. Bought the blue label bags. U can purchase these bags from any department stores like Daimaru, Sebu etc. just remember to do tax refund from the department store itself. I bought the Christmas Edition which can only be found in certain locations.
I'm going to Tokyo in 3weeks time. To be frank, Yen has dropped quite abit (little bit) coz i frequent there every 6months (or 3x a year) depends.
You can ask your friends to consolidate your purchase and then get a discount card from Burberry for your next purchase. Split your purchase.
Otherwise can always buy online in Singapore and spend your yen on food coz ultimately Blue Label is made in China only original Burberry (UK) is made in Japan.