I personally think it's most likely just for statistical purposes. If someone doesn't have a school they can put down then they could probably just fake it. I signed up and took it twice, 5 months apart, using the same email and school and everything except I used a fake name the first time. They don't seem too strict as long as you don't try taking it a bunch in a short period of time then they probably won't care.
Also, both times it took about 32 hours for them to approve my account. You guys will probably get your accounts activated in a few hours since they seem to approve around 10am-12pm JST.
Also, both times it took about 32 hours for them to approve my account. You guys will probably get your accounts activated in a few hours since they seem to approve around 10am-12pm JST.

