I'm after a bit of advice.

I'm after a bit of advice. I'm flying on CX from Nagoya in J. According to CX's website I can access the JAL Sakura lounge but the JAL website says I can't unless booked on the JAL flight number.. Has anyone flown from Nagoya with CX and used a lounge. I've also noticed the Centrair lounge service CX.. Any tips?

You can use any Oneworld airline's business class lounge when booked on and operated by a Oneworld airline in Business Class.

Not sure where JAL have come up with that from but it's incorrect.

You are correct about the Centair Lounge which is the contract lounge for CX passengers in Nagoya.

Feel free to try both airlines lounges out as you do have access to both of them.

There are some small photos here of both lounges -> www.centrair.jp/en/services/lounge/

If you have a priority pass card you can also use the Korean Airlines Lounge.

Do you have any status with any oneword carrier ie: QFF Gold?

If you do you will be able to access the lounge. I am sure that because your flying on CX and in J you should be able to.