Deci said:Some shading over the nether regions, more audio options, and what I think is pretty cool J-Rock music video after the credits, are present in the R-15. The music video is what makes the R-15 longer I believe.
That is correct. Just watched it last night. The only difference is the lack of the music video and that the shadows that were hiding nudity are gone. Seems like a Japan's MPAA equivalent requested fairly minor changes. This is no 'Director's Cut.' I shudder at the thought of what that might have entailed.