Is it not possible through Gmail?

Kida here to answer. You mean registering with an address like *****@gmail.com, correct? That’s perfectly fine. In fact, most people use Gmail. Or perhaps you sent a request for an interview but haven’t received a reply? We recently discovered that, due to the website renewal, some application emails were being filtered as spam. That may be what happened. Sorry for the trouble, but could you email us again at info@universe-club.jp or call us at 0120-966-531?