Marty Friedman spoke at the MIDEM last 29 January 2012. He ran a workshop on J-Pop for Music Publisher's Association of Japan (MPAJ).
According to wiki, "MIDEM is the acronym for Marché International du Disque et de l'Edition Musicale which is held been annually in and around the Palais des Festivals et des Congres in Cannes, France. The event, which is billed as the world's largest trade fair for the music industry, has been held since 1967. Several thousand musicians, producers, managers, and journalists from around the globe regularly attend the event, which is currently held at the end of January."
His workshop is called 'What is J-Pop? Exposing the myth of Japanese Music Phenomenon'.
You might remember Marty from Megadeath and from Arashi ni Shiyagare teaching Sho on the individual corner. ^^ (The guitarist with long curly hair)
Anyway, you can download the pdf transcription of his workshop from the MPAJ's website: (26-page long, includes Q&A with his audience. The journalist from Spain has a couple of good questions. ^^)
I think you can gain a different insight from reading the perspective from someone who is actually within the industry than outside spectator looking in. ^^ Budding musicians and producers who want to work in Japan (write for Arashi or something) might find this useful.
Yes, there is a tiny mention of Arashi. I was googling for another of his comments on Arashi's music production value and found this instead. Still trying to find the other comment. XD