I came across this video on YouTube, which has a lot of footage and goes into detail. The 787 pilot flew the plane into, or too near a thunderstorm, something that’s very forbidden in the aviation world because of lightning. Lightning struck the plane, causing the control surfaces on the wing to fail, which could’ve been catastrophic.

https://asn.flightsafety.org/wikibase/494678 the report for this incident.

After this I heard there have been other Japanese airliners being struck by lightning because the pilots, for unknown reasons, flew into thunderstorms.

Is flying into thunderstorms not forbidden in Japanese aviation law? I’m pretty sure if a US or European pilot did this, they’d get their license revoked.