FWIW, when we lived in Japan (some time ago to be fair...) we never had a problem redeeming on Cathay to MNL or HKG in J, so I’d try them first
Thanks. Look for reward flight on Cathay's website then call BA to book over the phone and they would waive the booking fee?
What shows up on Cathay's website would be available for using avios? Sometimes, airlines release more reward flights to their own customers than to partner customers.
I used to just give them a call, and not bother looking for availability on line first. But, the tools available to do so are much better than when I was travelling so your plan seems like a good one to me
You should search on BA website as CX has some strange releases to partners and their own asia miles redemptions only partially correspond to what’s available to BA to book