The NPB announced on February 27 that four graduates from the 4th NPB Umpire School (December 2016) were given assignments at independent leagues as Umpires in Training.
- Toshiki Moriguchi (22) – Shikoku Island League plus
- Yuya Kimura (21) – Route Inn Baseball Challenge League
- Shuto Takahashi (18) – Route Inn Baseball Challenge League
- Yuta Yamahara (18) – Shikoku Island League plus
Source: NPB 2/27/2017