2016 World Championships Highlights: Koki Niwa vs Pang Xue Jie

2016 World Championships Highlights: Koki Niwa vs Marcos Freitas

2016 World Championships Highlights: Koki Niwa vs Yang Zi

Koki Niwa vs Pucar Tomislav | 2019 World Championships Highlights (R16)

2016 World Championships Highlights: Koki Niwa vs Tang Peng

Koki Niwa vs Jakub Dyjas | 2019 World Championships Highlights (R32)

Xu Xin vs Koki Niwa Highlights Asian Championships 2017

2017 World Championships Highlights I Kristian Karlsson/M.Karlsson vs Koki Niwa/Maharu Y. (Round 3)

2018 World Team Championships Highlights | Koki Niwa vs Cedric Nuytinck (Group)

2017 World Championships Highlights I Xu Xin/Fan Zhendong vs Koki Niwa/M.Yoshimura (1/2)

2018 World Team Championships Highlights | Koki Niwa vs Lam Siu Hang (R16)

2018 World Team Championships Highlights | Koki Niwa vs Pavel Platonov (Group)

2016 World Championships Highlights: Koki Niwa vs Kiryl Barabanov

Koki Niwa vs Marcelo Aguirre | 2019 World Championships Highlights (R128)

2017 World Championships Highlights I Dimitrij Ovtcharov vs Koki Niwa (R16)

2017 World Championships | Highlights Fan Zhendong vs Koki Niwa (1/4)

Koki Niwa Training | Liebherr 2019 World Table Tennis Championships

JEONG Sangeun vs NIWA Koki 1/2 FULL MATCH HD Asian Championships 2017

2017 아시아탁구선수권 정상은vs니와코키 준결승 Asian Championships SF Jeong sang eun VS Niwa koki

2017 Asian Championships MW QF NIWA Koki YOSHIMURA Maharu CHEN Chien An LIAO Cheng Ting(TP

Koki Niwa vs YOSHIDA Kaii | 2021 Japanese Table Tennis Championships

Tomokazu Harimoto/Koki Niwa vs An Jaehyun/Cho D. | 2019 ITTF Korea Open Highlights (R16)

Point of the Day 2 presented by STIGA | Koki Niwa | 2019 Hong Kong Open

Koki Niwa/Mima Ito vs Lin Yun-Ju/Cheng I-Ching | 2019 ITTF China Open Highlights (1/2)

Slowmotion Analysis - Fan Zhendong VS Koki Niwa - Push Long - 2017 WTTC

DHS ITTF Top 10 - 2018 Japan Open

DHS ITTF Top 10 - 2018 China Open

Zhang Jike vs Tomokazu Harimoto | 2018 Japan Open Highlights (Final)

Ito Mima vs Wang Manyu | 2018 Japan Open Highlights (Final)

Jeoung Youngsik/Lee Sangsu vs Liang Jingkun/Zhou Kai | 2018 Japan Open Highlights (Final)

Chen Xingtong vs Ito Mima | 2018 Japan Open Highlights (1/2)