They made changes to the eplus and ticket pia sites this year.
Now you need to enter a confirmation code that the site sends to the phone number you use to make an account. So now you need access to a Japanese phone number to get the code :/
http://eplus.jp/sys/web/s/ninsyo/index.html
http://t.pia.jp/guide/tel-auth.jsp
I thought lawson was going to use the same system, but I can't find the email from them so I could be wrong.