Country: Japan
Date of Birth: October 10, 1994
Koki Niwa is using Koki Niwa ZC for his blade. He is using V>22 Double Extra for his forehand rubber and V > 15 Extra for his backhand rubber.
Blade: Koki Niwa ZC
Forehand Rubber: Victas V>22 Double Extra
Backhand Rubber: V > 15 Extra
Blade
Rubbers
Forehand Rubber
Backhand Rubber
Sources and Link
In this Instagram post, Koki Niwa gave reviews on Koki Niwa ZC, V > 22 Double Extra, and V > 15 Sticky rubber . He said that the relatively hard sponge of V > 22 Double Extra allows counter looping close to the table while the V > 15 allows for spinnier shots.