The “こんにちは!追加料金を避けるために債務を清算しましょう。” is a scam email that’s a Japanese version of the well-known ‘Have you recently noticed that I have e-mailed you from your account‘ Email scam. The scammers have translated the message to target Japanese-speaking people. Here’s an example of the “追加料金を避けるために債務を清算しましょう。” (‘Have you recently noticed that I have e-mailed you from your account’)