JL36 does not offer the Hibiki to First passengers. It is sometimes operated by 777 with first and sometimes with 787 without first, so perhaps this is the reason.

Cabin crew showed me their document on the iPad detailing which routes had it and it seemed to be US routes, LHR, SYD, and BKK.

Worth asking though if on SIN-HND, as they gave me the good news on waking up (after initially apologising and saying they didn’t have it on the route) that they had located a bottle and I could purchase it.