Wirelessly posted (BlackBerry8830/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/105)

The CO website never did a good job of showing partners for either reward or revenue flights. That has changed a bit recently for revenue but for reward it is still rather limited.

The CO reward policies require that rewards to the far east take a Pacific routing so you would not be permitted the LHR (or CDG/AMS) flights to get to TYO.

To best see availability for SkyTeam use nwa.com. It will show a much better (though not perfect) collection of flights including KE to Asia.