If you need to pack and protect your stuff, you will do the best you can and use even the most expensive materials. However, sometimes you will not be able to transport your stuff as the relocation is organized. In those cases, you should rent a warehouse in Japan which will take care of your stuff in a proper way. It is the cheapest and most protective way to take away your stuff from damage. On the other way, you are sure that keeping stuff in storage is a good way to protect them from loss and damage, especially if you control all conditions in it.