Do you know automated gate at the Narita Airport?
When immigration, it is a normal step is to pass the passport to customs officials of the manned booth says completed got the immigration mark.
But it has become like can breeze and immigration in the beep beep I like the ETC is now.
Do you use any credit card?
If it is money that must be used anyway, credit card or do not want to aim a point back, etc.?
If you think so, you can show offices of credit card of choice also arm if aiming a businessman.
There is a variety of credit card in the world, but if the ride well in work patterns airplane, after all airline-affiliated credit card is recommended!