Hi,
The issue was raised in 2015 and I believe it related to lots of Alphard , ours is 2004 but the company importer didn't check to see if the issue was resolved that's Campervanco.
The recall wasn't picked up by them and it was difficult to find but when we read it sounded pretty serious; the passenger airbag had a fault that meant fragments of metal were likely to be ejected from the airbag should it be deployed.
I have raised this with Japan and they are supposed to be getting the local dealer to sort, watch this space !
I will try and find the recall and post it for you to see.
Take care