After lots of research and lost time, the only solution is, that I ship the bike to Japan and I do the work in India and Bangladesh without. The cargo is unfortunately expensive, so I can do this only one time. There is always the possibility to rent a small bike down there, if I dare to ride in the crazy traffic. In February we will meet again and I am looking forward to ride up and down Japan!
The guys of Global Link work hard to make the smalles box for the bike, after I took out the front wheel and deinstalled the windshield and the mirrors. You have to pay not only for the weight, but for the volume as well. Thanks guys!
(I cross fingers it arrives in one piece!)