Using a Yahoo! JAPAN mail address in both Japan and another country within a short period can lead to it being flagged as unauthorized access. If this happens, your account may become permanently inaccessible. Yahoo! JAPAN rarely responds to inquiries and provides almost no support in these cases. Therefore, it is strongly advised never to log in from Japan and another country within a short timeframe. Since their support is practically non-existent, you should assume that you will never be able to use the same account again. Has anyone else had a similar experience?
(If many others are facing the same issue as I am, I intend to take action by notifying the relevant authorities, reaching out to Yahoo! JAPAN through various channels, and contacting the Japanese media. If you are experiencing similar problems, please share the timing and the specific symptoms you’ve encountered.)
by neu_gier