Japanese tourist visa mother is self-employed. How can I show my company to prove these?

If you are a self-employed, you need to issue a copy of the business license of the self-employed, and then print the work certificate and affix the seal of the self-employed. If there is no 50,000 frozen deposit, you can provide a copy of the real estate license or a copy of the car driving license, or you can ask the bank to issue a financial management certificate. Deposit freeze and real estate are both proof of assets, and you can choose to provide both.

I hope it helps you.