Are you located in Japan or do you have any IP-Spoofing software that change location? If that case then it would happen by detect your IP. I suggets to delete cookie and problem might be resolve.
go to Safety->Delete browsing history( or press Ctrl+Shift+Del key), make sure cookie is selected and press delete. Then close your browser , disconnect from internet and try again. MSN Japan is legal website and it not expect to be problem with Malware.
If that not work, go to Tools->Internet Option ->Advance and click reset and reset your browser.
These are guide for Internet Explorer .