Welcome to the SR family!
I am happy you found us, but sorry for the reason's that brought you here.
Please make yourself at home by reading and posting as much as needed. You are not alone.
I understand that you are living in a different country. I am not familiar with the laws and customs in Japan. However, we have international members and maybe someone will be able to offer assistance.
Is it possible for you to open your own bank account? Even if you are not working, can you start putting aside some personal funds? It helped me to know that I had seperated my finances from an active alcoholic that was willing to take every last penny to feed his addiction.
Do you have friends of family in the states that can assist you?
I also recommend looking for local Alanon support meetings. If the meetings are not in your area, they also have online meetings. Please continue to reach out for the support you need, you are not alone.