The first is that Japan gets the most consistently deep powder snow you will ever experience. Thigh to waist deep snow is a daily occurrence in Japan and if you take a regular camber board that you ride in Australia, you will sink. Even if you have some rocker in your board like a Burton Flying V shape, you will have more fun if you buy a powder specific board.
Powder boards allow you to ride a shorter board in the deep snow as they are wider, have taper and a nose that stops you sinking. A little extra width is great in deep snow. It allows you to get the same surface are as a longer board but will turn around the back of tight trees easier and will be lighter on your feet.
Taper is whenÂ nose of the board is wider than the tail. This is like havingÂ power steeringÂ in deep snow and allows the nose to float and the tail to sink. This means you can relax in deep snow knowing that you have a much smaller chance of falling over the nose. It will also make the board feel more like a surfboard and allow you to turn more easily in between tight trees.
Here are some examples of powder boards that would be great in the powder of Japan.