This Nintendo Virtual Boy is made box protector that fits the Nintendo Virtual Boy. This may possibly fit the Japanese size also but we have not verified that yet. The size of the box that fits in this protector is roughly 14 13/16 x 12 9/16 x 5 13/16 or 37.7 x 31.8 x 14.7cm. That is not the protector size but the size of the actual console box. This Nintendo Virtual Boy Box is of very good quality. You can use it very easily.