This certainly would be welcome for NRT/HND!
Not sure about HKG, ICN, PEK or PVG, but it seems that not too long ago NRT was the exception with two free checked bags in Y for non-status passengers.
I certainly hope this is true as we're planning to spend a month in Japan next year and had anticipated switching to JL ex YVR for the increased baggage allowance - as well as to be 100% certain to avoid AC's 77HD.
Please do post any more info when available.
Right now the AC website is still showing one free bag to NRT.
I'm not really sure that I would trust a verbal promise to my TA!