Talk:Tutorial: Troubleshooting/@comment-25104382-20151215131307/@comment-1820055-20151215135626

http://kancolle.wikia.com/wiki/Tutorial:_Troubleshooting#Registration_Catbomb

it was also mentioned that you need to be on JP IP during registration, but I haven't verified it. Try changing timezone first. If still doesn't work, then try timezone+VPN