Board Thread:Support Requests - Getting Technical/@comment-222.127.119.24-20150711053815/@comment-15636815-20151015185829

The ja: link on that site is an interlanguage link to a Japanese version of that wiki.

A w: link goes to Wikia Community Central, where they keep a repository of templates that can be shared and used by whomever wants to use them. From what I understand, using cross-wiki templates in this fashion is restricted to user pages. Putting them in the content of your wikia is forbidden because it would put too much strain on the servers.