You can edit almost every page by Creating an account. Otherwise, see the FAQ.
This page was kept on Wikipedia check : https://ja.wikipedia.org/wiki/.300%E3%83%8E%E3%83%AB%E3%83%9E%E3%83%BB%E3%83%9E%E3%82%B0%E3%83%8A%E3%83%A0 https://ja.everybodywiki.com/.300%E3%83%8E%E3%83%AB%E3%83%9E%E3%83%BB%E3%83%9E%E3%82%B0%E3%83%8A%E3%83%A0?action=history