I just tried to call TakaraTOMY regarding the recurring 403 error on their online survey site, but I've come to realise two things:

1) They have new numbers for their call centre. The number on the bottom of the toy box is only for domestic calls. There's a separate number for international calls which isn't listed on the box, but is on their web site, which is 0011-81-3-5650-1031.

2) Their call centre doesn't open until 10:00JST... so I just called an hour too early. I'm about to step out, so I'm not sure if I'll have time to try again today (so if there are any other Japanese speakers reading this, and if you have the time/inclination, then please consider giving TakTOM a call about this issue Those of you who are in Japan (e.g. Tets, Odie) may use the standard domestic number on the toy boxes, 0570-041031).