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Now, I'm not going to debate it (because I agree), but I do think this kind of statement needs proof from a reliable source.

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I've said it below earlier that he wasn't considered very famous in many parts in the world. So a citation is needed for the rock history thing. Because it's vague when you say just rock history, it would be fitting for Yoshiki to be the an influential drummer (maybe most, but that might need a citation as well) in rock history in Asia.  

So, when we say that Bonham is one of the most influentials drummers in the rock history, we have to say that his one of the most influentials drummers in UK and not in the rock history? =/, yeah, Yoshiki is the mots influential drummer of Asia, but Asia is also inside the rock history don't forget this ;)

 Only Japan? 

Somebody has just put that Yoshiki is one of the most influential drummers in Japan rock history, eehm, everybody knows that Yoshiki is THE drummer of Japan, and because of that is one of the most influentials in all rock history, not only in the rock history of Japan, if you see bands in China, Korea, et.c you'll see that their drummers are fans of Yoshiki.

Well, I guess not just Japan but in Asia. The reason to why I put that is because while Yoshiki is well-known in parts of Asia, he wasn't as influential in many countries like the Americas, Africa, and Europe. Sure, there are people in those continents that like him (and X-Japan as a whole), but it's not enough compared to the majority who hasn't heard of him or X.  
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 Rewrite 

The article has been rewritten to conform better with WP:V and to fix some of the damage done by this recent edit. I use the word ""damage"" because the editor in question is a regular contributor to X Japan and was, at the time of the edit undoubtedly aware of the numerous references already available for that article. Why the editor failed to introduce them here, in order to preserve at least some of the information is quite puzzling. -  "