Brett,
I don't know how to tell you this!! .........But your not going to Japan mate, your going to CHINA!!
Your not going there to work in an office, your not going there to get married, and wearing a suit to meet prospective parents is not required, or expected!! In other words, leave the suit at home where it belongs.
I thought you said that you blend into the background and become inconspicuous wherever you go, well you'll definitely stick out like a sore thumb in a suit, .... especially during the evenings!!!
China is has a completly different culture and mind frame to Japan, you'll be making a very big mistake if you try to associate one with the other.....
Depending what time of year you go to China, you would be far better off taking warm clothing or more lightweight clothes than packing a suite, that's going to get creased to buggery on the trip. In fact i'd suggest you leave extra space in your case and buy your clothes in China, there much, much cheaper than anywhere in Europe.... I always go with an empty case, and come back with a case bursting at the seams!! ...hahaha!! Most of the stuff I've bought there has been pretty good quality too, but you do have to be a little discerning in choosing what you buy....
All Joking apart, forget the suit Brett....Really!!
David....