"people will save. that money that's not spent will be spent on investment. with high interest rates, people will stop parking money in the absolutely useless form of bricks and mortar residence"
People won't save, or not enough of them will, a significant increase in interest rates will see a huge number of the population have far lower disposable incomes because they will pay more back to the bank each month. This will lower consumption, and the multiplier will see to it that this will end with a recession. Also with higher rates we have the Keynsian paradox of thrift, we want people to spend, but they will save their money. Are you really advocating big drops in demand in order to "fix" the economy?
"what's the backing that low interest rates are working? I see an inflated stock market, an inflated housing market, and swathes of part time jobs. is this a successful policy?"
At least we have some growth, some jobs, the stock market has been boosted by QE more than low rates, I agree about the housing market, but again thats been boosted by QE too.
The Japan issue is different, it for one has a higher savings rate and lower consuption rate, as well as the currency appreciating! Both of which would be the effect on a higher interest rate.
So you'd back a recession and the unknown effects of what it would cause in order to lower house prices? What would happen to the firms you are backing to start manufacturing things during this time?
Great, is this for your own advantage or society's?