Okay. The thing is, if it was a suggested tag it would be used more. It's a complete style. Here is a link for more info on what it is: Gurokawa. Thanks for reading(:
Viewing post in Add "gurokawa" as a suggested tag, please
From what I remember, tags are add based on popularity. As in, if a lot of people search for a specific type of game, then a tag for it is added.
If I remember well, tags have been removed in the past for being unpopular. The best chances of a new tag to be added is for a lot of people to start searching for it first.