Haha thanks for all the suggestions everyone.
It's true - we originally planned ot create a Japanese version of our curriculum, but we had to put the project down to prioritize a few other projects for the company.
However, instead of all the backlog language curricula projects (loads of people are asking for curricula to be produced in all different languages) and so we might be able to get projects moving depending on demand, I think we will try to get a poll together to see which languages should be produced, and maybe we can get a kickstarter project going for it to happen. This way, if enough people want it, we can create it, and this way, we can also find a way for you guys to be more involved in the curriculum production - maybe as donors or funders through kickstarter, or as curriculum development helpers.
Crossing my fingers that we can get this going soon.