I went to the Japanese tourist embassy to collect the deposit certificate and how to unfreeze it when I came back.

Generally, this deposit certificate is only used as proof of funds for applying for a tourist visa abroad. The visa company will require you to open it for at least three months, but the original of this certificate generally does not enter the embassy. After you come back from traveling abroad, you can go to the bank to get the original deposit certificate from the travel company you signed up for. If you can't get the original, you must thaw it naturally after three months. I suggest you tell the travel company when you send a message, and you should hurry to unfreeze it when you come back, so that they can leave you a deposit certificate in advance, so as not to come back and say that you can't find it.