There is some rationalization underway in the Japanese airline business at the moment.  JAL and ANA are both taking control over smaller operations as a result of the difficulties that COVID has placed upon them.  However, even before COVID reared its ugly head, JAL had created a new subsidiary.  This is called Zipair.  I recently read that it is due to start operations soon which surprised me because I thought I had seen its planes before.  It turns out I saw one of their 787s as it was parked up at Narita when the flight I was on was taxiing in after landing.  I guess that airframe hasn’t had much use yet.