The primary basis for my opposition is that the matter appears to be considered only from the perspectives of military-based national security and short-term economic gains. Considerations regarding long-term impacts on the overall competiviveness of Japan and the effects on the optimal use of human intellectual resources are conspicuously missing.
Other than being against ethical values that, I think, most Japanse dearly value, here are the main reasons for my opposition to the new policy:
1. Weapons development is an intellectual black hole. Things go in, but nothing will come out.
2. It will dramatically change the climate of research and development in science and technology, negatively impacting open exchanges of ideas.
3. Brightest minds will be siphoned off from working on research and development for truly useful applications.
4. It distorts public opinions and democratic process.
5. Increase in the number of people and companies economicaly dependent on continued and increasing weapons spending is just bad as President Eisenhower warned in his farewell address.
Eisenhower Farewell Address -- Military Industrial Complex
For the U.S. it is 50 years too late. For Japan, we can still go back, if we stop now and make the research and export restrictions into a law, not a mere statement by a prime minister.
For our daily weapons needs, we might as well buy them all from the U.S. to keep them happy, be it F-35, missile defense systems, drones such as Predators and Reapers. It's like throwing away perfectly good tax money, but I believe it is 100 times cheaper, wiser, and better in the end than start growing the Military Industrial Complex here. Isn't it one of those "Been there, done that" things? Wasn't it really painful the last time around?