tomonFT

I booked a trip in economy on JAL via OTA.

I wasn't able to specify frequent flyer program while booking at OTA, but I can update it through "hack" as described in this post.

I have OWE through Qatar Platinum, so I configured my QPC nr. figuring to possibly get OWE benefits like seat blocking, but in regards to miles for the trip; I think I prefer to credit to JMB as I have 10k in JMB from a previously credited QR segment, which is not that useful now, but when crediting this flight I'd have 15k in JMB which would be enough for a premium economy upgrade on a future JAL flight and I guess crediting this flight to QPC would just be a drop in a bucket as QR miles are not worth less and I figure the QPC Platinum 100% bonus miles doesn't apply on partner airlines.

Any thoughts? I figure to ask to change frequent flyer program to JMB at check-in.

CPH-Flyer

There is not much in terms of seat benefits for OWE on JAL. There are a few rows that you can pick, but I have never seen evidence of a seat block, even as a JAL Diamond.

So, if you want to accrue to JAL I'd just change the nunber now if it was me.

JALPak

Check the price of upgradable economy ticket and premium economy ticket. You may change your mind afterwards.

Tokyoite

What OWE benefits?
other than lounge access and priority boarding, nothing more.
Dont put the QR FFP number on. Just show your card.