| Season | League | Apps | Min | Saves | Clean sheets | Conceded | Conceded / 90 | Rating |
|---|---|---|---|---|---|---|---|---|
| 2021 | J3-League | 5 | 450 | — | 1 | 15 | 3 | — |
| 2022 | J3-League | 4 | 360 | 0 | 5 | 44 | 11 | — |
| 2023 | J3-League | 29 | 2610 | — | 6 | 45 | 1.55 | — |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Goalkeeping figures come from the season goalkeeping record; conceded per 90 is computed from minutes actually played.
Domestic league seasons with a goalkeeping record; seasons the provider left empty are excluded rather than counted as zero.
Figures computed from the GioScore season-stats database · as of 2026-09-06
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Kamatamare Sanuki | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 YSCC | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Fujieda MYFC | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Vanraure Hachinohe | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Yokohama F. Marinos | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Matsumoto Yamaga | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Imabari | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Ehime | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Giravanz Kitakyushu | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Kataller Toyama | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Kagoshima United | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Iwaki | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Tegevajaro Miyazaki | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
The 2023 J3-League brought Koshiro Itohara 29 appearances (2,610 minutes).
3 league seasons (2021–2023), all with a single club made up his recorded career.
In goal, the league record shows 12 clean sheets in 38 appearances — 32% of the games he finished without conceding. Those same league seasons carry 104 goals conceded, 2.74 per 90 minutes.
