Triple-Digit Post Count
good point about judo focussing on power as the sport requires it. there are a couple of national judoka who do some sessions at my bjj gym just to brush up their newaza - they do a lot of power cleans or power clean+jerk. Having said that, they are already pretty strong to start with so I imagine you need a good strength base to "convert" to power if that makes sense. For upper body work they do bench presses, pullups/chinups and rope climbs.