OBJECTIVE.
The research group including Professor Jiro Murata (College of Science, Rikkyo University) , Hinako Sonobe (4th year student at the time, College of Economics) and Eri Ogihara (3rd year student at the time, College of Community and Human Services) has shown for the first time through measurements that, in order to change the trajectory of a curling stone, it would be effective to "sweep (polish) the opposite side" of the direction in which you want the stone to curve.
The results of this research were published in Sports Engineering journal by Springer Nature on September 19th.