There could be a workaround for the terrible tissues (first World problem lol) for J passengers.
On my most recent sake flights back from Tokyo via Doha to Brussels there appeared to be a new addition to the amenities in the A350 J toilets - a Rituals alcohol based 'soap free' hand-wash gel - up on the same shelf where the smelly spray sits. Although it was initially a bit sticky on the hands it dried off quite quickly and left a pleasant mint based fragrance on your hands and was a useful alternative to hand washing.
The hand-wash gel was definitely not present in the J toilets on our outbound flights to Tokyo so perhaps this is a new addition for October?