Experience wise, every flight I took with JAL suffers from some form of delay.
I think JAL still using the older and aging fleet of B777 for flights to Tokyo.
Whereas for ANA they are using the newer B787 Dreamliner.
I prefer ANA, slightly pricier, but it is a star alliance member, and you can redeem points for the flights
i take ANA. They are slighter more ex than JAL but you can combo SIA flights into their program and vice versa
Like for my upcoming trip. I chose JAL because they have red eye flights to Haneda Airport.
Both Singapore Airlines and ANA have red eye flights, direct to Haneda as well.
NH844
SQ5906
Both Singapore Airlines and ANA have red eye flights, direct to Haneda as well.
NH844
SQ5906