As you are aware, every time you receive a comment through Hatena Star, you are notified at the e-mail address you registered with. Now the last part of the URL of the message sent to you will be different according to its contents, and will switch to either the Japanese site or the English site.
In the past, all messages were sent from http://m.hatena.com, therefore directing some Japanese users to the login page of our English site. With the latest modification, we expect this problem to be eliminated. In the future we plan to add a more reliable system so that users will always remain within the same URL as they are using.
We apologize for any inconvenience this problem may have caused.