I'm really confused about Ayumi's tasking, because its been used in at least THREE places. It's also glaringly obvious in Hande Yener's song "Hayrola?" which was released in 2009.
It makes me wonder if there is some place where artists can go buy soundclips to use or something. I just can't think that in 3 separate cases the same tune was used coincidentally, or that 2 out of 3 of these artists blatantly ripped the tune off from someone else. Thats why I think that all 3 artists must have gotten it from another source.
I'd guess the same for the Hoobastank song and taskinst. I really think that Tasuku must be using some sort of generic music clip bank kind of thing. I actually wonder if the same applies for those remixes too. Leave You Far Behind and the FRIEND II remix do sound very similar as well, but I highly doubt that the remixer took it from the other song. I'm really thinking that all these similarities come from a third source where both the Ayu song and the other song are sampled from.
As for Pride, that one has always bothered me because it sounds SO similar. I agree though, if its anyone fault on this case, its Geo of Sweetbox since he's the "composer." of the song. Its hard to believe though that he would have lifted from such an obscure song from 1991. o_0 And maybe he didn't, I won't accuse anyone.