Oh! That's a shame
thanks guys for the quick reply. We have 75 mins layover at Frankfurt, before our connecting flight to Osaka, I am worried that it might not be enough time that's the reason I want to change. Guess we will have to chance it. If the flight from LHR to FRA is delayed causing us to miss our flight to KIX, LH would have the responsibility to rebook us right? Might try calling LH to see if we can go on an earlier flight... Or if we buy a single tkt on an earlier flight would they check us through to Osaka?