Moving to Nagoya with three under five

I am from the UK and I have been offered a job in Nagoya. Taking this will mean relocating my family, which comprises my wife, myself, our four year old and our two year old twins. Not sure how long the job will last but it'll certainly be a year at least.

There's so much in favour of accepting the job and challenge, not least that it'll be an incredible adventure for all of us. But being very practical people, we would both like to understand more about the process of moving, the especially good/bad parts and the things that are likely to be an issue for outnumbered parents!

I can't find much online about families with multiples, or even three very young children generally, having been through moves to Japan. Obviously it must happen all the time and I'd be really keen to hear of anyone's experiences.

Thanks!