That's where we disagree then. Changing IPs and even changing countries should not be seen as suspicious activity, as far as I am concerned. As I said above, if you use Tor your exit node can and will jump all over the world. Exchanges should not be punishing users for taking their privacy seriously.

If, as in your example, I logged in from Japan, made a deposit in Japanese Yen, traded it to bitcoin, and then the next day logged in from the UK, sold that bitcoin for Great British Pounds, and tried to withdraw it, then sure, that's an argument for suspecting money laundering and completing KYC. A simple IP change is not.