We check this website, now lolbuild.jp is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is lolbuild Down Right Now? - NO! lolbuild is up!
If you have problem with access to site lolbuild, and domain lolbuild.jp is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).