Additional perks of traveling business class with JAL consist of an additional checked bag allowance, in-flight extras like slippers and noise-canceling headphones, and attentive provider from the flight attendants. Additionally, once we boarded the taxi/wait time was also extended, Using the pilot blaming “building at SFO” to the hold off, https://businessflightshop.co.uk/blog/difference-between-first-class-flights-and-economy-class-flights/