So aviationwire just released additional report regarding the 10 x 787-9s which most probably would go to Zipair with some of it to increase JAL's current fleet.
Given that 2 x 787-8s for ZG were already placed to Boeing for a 2025 delivery, this I guess completes the 12 remaining options that JAL has for the 787s.
https://www.aviationwire.jp/archives/296957