I went with the intention of doing just this, so good luck. No doubt you have researched the shops via youtube etc but unless you have buddies in Tokyo or family you may find that navigating around Tokyo pretty tough. In Japan Airsoft is not that big as in Hong Kong for instance and so some places are pretty disappointing such as the shops under the rail track in Ueno. The Japanese are also uber crazy about rules and regs . It was hard enough even getting a wooden Katana on a Virgin flight never mind a real one.
I have a good/ the best AZ of Tokyo and a couple of Suica cards which I think have about10k Yen on if you are interested ? Happy to trade pehaps for a front sight for my TM PX4 if you can get your hands on one
