Would like to book an award ticket from MNL to NRT, spend 4 days/ 3 nights in Tokyo, then fly onwards to SIN, spend 3 days/ 2 nights there, then return to MNL, via NRT no stop over in Tokyo on the return. Is this doable on one award ticker? Also, if it is, would it be best to do the stop over in Tokyo on the way to SIN or on the return?

Thank you