As we could not say goodbye to our little camper van, we decided to take him to germany! This means work, more paper work and costs!
First you need to think about whether to proceed mainly on your own or take professional advice. I suggest the latter.
If you have a shipper you can trust on (highly recommended: JTrading.jp) it is more a less a piece of cake.
The fun might start in your “home” country, but since there are too many local regulations, I cannot really give too much advice. For Germany, professional help eases up your live, but for sure it comes with a price tag.