This would be a major step back from the supposed liberalizing of consumer mobile rights which MIC has suggested, previously. Perhaps a loophole to reverse the pressure on Operators to loosen their stranglehold over the consumer. Started with pressure on more transparency on the regressive subsidy schemes where lower tier users turned out to be paying more for service then the higher tier folks. Thus pressure to provide more transparency in price of service vs hardware. Subsidies ok, just users should have option of paying for hardware straight-up with a lower monthly tariff. Softbank, with Mr Son in charge, the mavericks of the market first to take steps in this direction. Note: It is commonly felt that DoCoMo and AU dislike Mr. Son(Korean heritage) for not playing along in the mobile oligarchy. This would be another step to further isolate the Japan cell phone market. Keeping out more global foreign brands.
Of course, illegal music is bad and to extent can be deterred then all for it. However, in this case likely cure will be worse than the disease and hurt consumers. This has further implications on implementing another local barrier to foreign competition.
The big 2 Operators cling to the same ridiculous claims as the major US Operator overlords. Operator control of mobile ecosystem in long-run provides more benefits to the consumer. Sounds like China's justification for restricting freedom of speech etc...(debatable whether true-short in some cases short run, but is it worth it?)
Anticipate a more watered down approach to appease the RIAJ, while Operators and MIC as overseer maintain good faith negotiations to avoid potential claims due to not taking reasonable limits to prevent/deter piracy.
PDC, i-Mode, non-std CDMA(being phased out) all examples of local barriers which supposedly protect local industry but further isolate their products and competitiveness.
Curious how the DPJ will react? They promote themselves as the people party with desire to break overbearing Ministry & Industry giant links in interests of people/consumers. Though can see them siding with a more isolationist approach as well to further protect local businesses or sit passively back as they have many other challenges.
Luckily this affects mostly the younger consumers who are much more tech savvy and will naturally alter music listening behavior accordingly (as also noted by others).