I'm recently trying to study tax laws harder to keep myself updated. Otherwise I will behind the time.
It seems that in a certain situation, you can save a lot of your income tax by issuing bonds from your company instead of having property income from properties/real estates that you own.
For example, if you have properties and you are renting them out, you have property income. Because Japanese tax system have progressive rates, which can go up to 50% having 40% national income tax of 10% resident tax.
One possibility is you set up a company and sell the properties at fair value. You may have to pay tax on capital gain but it is only 20% if you have owned them for more than 5 years.
You transfer the ownership of the properties and get in return private bonds that generates interest income. If is called "private bond", if the number of investors are less than 50 people. You will not have to meet all the requirements for issuer of normal "public" bonds.
The tax rate on "interest income" is only 20%. You can see the difference in the tax rates (50% vs 20%).
The tax law changed quite recently and it technique is allowed only for bonds issued before Jan 1st, 2016. We have still have one year and 7 months to take advantage of this scheme.
Of course, interest rate from the bond will have to be reasonable.