[Positioning] The referee stops when the focus of observation changes

The main point is the referee's decision to stop moving at the moment of the shot. The referee adjusted position to keep Kashiwa's player on the left in view and, when the through ball was played, moved quickly towards the challenge. The footage then shows the referee coming to a stop. When an attacker gets in behind, the referee may need to move closer to judge possible contact with an advancing goalkeeper and a potential penalty kick. Here the goalkeeper stayed in position, ready to react to the shot. It appears the referee judged that contact with the goalkeeper was less likely and shifted attention to whether anyone touched the shot and whether the ball would be played back across the goalmouth. The referee stopped where both could be seen rather than continuing towards the goal. If this was the thinking behind the adjustment, it shows excellent observation and judgement.