How to send money cheapest needs to consult the bank you choose. Since China Bank has a branch in Japan, and the payee also has an account with China Bank in Japan, you can choose to remit money at China Bank. Because the remittance bank and the receiving bank are the same bank, it must be the cheapest.

In fact, the main problem of handling fees comes from inter-bank transactions. For example, if your friend has an account with Mitsui Bank, you need to remit money there. If you remit money at BOC, there will be a handling fee for BOC's funds to flow to Mitsui Bank, and you need to pay the handling fee of two banks (BOC will pass it on to you), so the fewer intermediary banks, the cheaper your handling fee will be.

So what you need to do is to know which bank your friend collects money in Japan first. Remember the name of that bank, and then check whether there are branches of that bank in your city (such as Mitsui Bank, which has branches in Beijing, Shanghai and Guangzhou). If not, ask Bank of China if the payee bank is the bank of China (note that it must be the bank of, which means that Bank of China has an account in that bank, otherwise it must be transferred through other banks, and more fees will be paid for each transfer). You need to consult ICBC again, or others such as Shenzhen Development Bank, China CITIC Bank and China Everbright Bank. If the payee's bank is the remitter's bank, your handling fee will be the lowest.

Specifically, it is cheaper that way, and it must be telegraphic transfer. This also needs to consult the bank. You can consult the relevant banks together with the problems of the above banks.