Employees got the weight of each Sumo wrestler from the Nihon Sumo Kyokai website and discovered that both JL659 and JL2465 on the 12th would be off weight and balance. […]
JAL operation contacted other departments and in the early hours of the 12th, JAL decided to operate an additional unscheduled flight on HND-ASJ just for sumo wrestlers.
damn how much weight was there to warrant an additional flight? I guess they also had to take into account placement of each passenger to avoid balance issues