Ryuma Kidokoro has not taken a single day off from training since the 2013 off-season. He does not like taking the day off because it gets harder to get back into the workouts the following day.
Kidokoro worked with weight five to six times a week until last year. He now works with weights about twice a week because he wanted to focus on speed and flexibility. He also found that he was still able to hit the ball far.
Source: Sponichi 6/21/2016