Board Thread:Consensus Track/@comment-34115-20150626063702/@comment-1251315-20150626085451

Dantman wrote: This issue is fundamentally the same as this previous thread. The issue of "clan over Clan" can be solved in the same way that thread was solved: use whatever the subtitles use and they use "Clan", because the word is used to refer to something unique. As you rightly point out, Japanese has no indications of using title casing, so it's up to fans to decide the casing and the majority of fans will refer to clans as a proper noun.
 * Our source material is Japanese. Japanese has no concept of case. And the nature of translation introduces even further variance beyond that within English.

I would assume that the issue of decapping "clan" is because of some previous consensus where it was decided to use "clan". I don't know where that consensus is, or what rationales were given, but it may be useful to find that original consensus again.