It takes a lot to shock Eddie Jones. Yet even he found his eyebrows racing skywards when Jamie Joseph, his successor as Japan head coach, told him the Brave Blossoms were aiming to reach 50 minutes of ball-in-play time. In rugby terms, that is the equivalent of not just running a two-hour marathon, but going 1hr 45min. The current average for ball-in-play time is nearer 36 minutes. Most teams are trying to raise that by one or two-minute increments to go above the 40 barrier. If other sides are attempting to land a man on the moon, Japan are aiming for Mars. Nearly every leading team have come to this World Cup proudly declaring that no one can match their fitness levels. For a coach such as Warren Gatland, these pronouncements are for the psychological consumption of his Wales team as much as a statement of fact. With Japan, it is a core part of their identity. That is reflected in their performances. Entering the third week of the tournament, Japan led the charts for collective tackles and carries with 278, ranked second in tackling completion, third in passes made and third in ball-in-play time. Tellingly, they have won the…