| Temporada | Equipo | Competición | PJ | G | A | Nota | ||
|---|---|---|---|---|---|---|---|---|
| 2026 | Okayama | J1 League | 9 | 1 | 2 | 0 | 0 | 7.3 |
| 2025 | FC Tokyo | J1 League | 20 | 1 | 1 | 0 | 0 | 6.7 |
| 2024 | FC Tokyo | J1 League | 20 | 1 | 2 | 1 | 0 | 6.8 |
| 2023 | FC Tokyo | J1 League | 11 | 0 | 0 | 1 | 0 | 6.6 |
| 2023 | Kyoto | J1 League | 17 | 0 | 1 | 2 | 0 | 6.8 |
| 2022 | Kyoto | J1 League | 29 | 0 | 1 | 1 | 0 | 6.7 |
| 2021 | Kyoto | J2 League | 32 | 0 | 0 | 3 | 0 | – |
| 2020 | Hokkaido Consadole Sapporo | J1 League | 27 | 0 | 0 | 1 | 0 | 6.6 |
| 2019 | Hokkaido Consadole Sapporo | J1 League | 22 | 1 | 1 | 3 | 0 | 6.8 |
| 2018 | Hokkaido Consadole Sapporo | J1 League | 10 | 1 | 0 | 0 | 0 | 6.6 |
| 2017 | Ehime | J2 League | 41 | 4 | 0 | 1 | 0 | – |
| 2016 | Ehime | J2 League | 40 | 3 | 0 | 2 | 0 | – |
| 2015 | Ehime | J2 League | 10 | 1 | 0 | 1 | 0 | – |
| 2014 | Shonan Bellmare | J-League Division 2 | 1 | 0 | 0 | 0 | 0 | – |
| Total | 289 | 13 | 8 | 16 | 0 | – | ||
| Fecha | Desde | Hacia | Tipo | |
|---|---|---|---|---|
| - | Okayama | FC Tokyo | Return from loan | |
| 02 ene 2026 | FC Tokyo | Okayama | Loan | |
| - | Kyoto | FC Tokyo | Transfer | |
| 02 ene 2022 | Hokkaido Consadole Sapporo | Kyoto | Free agent | |
| - | Kyoto | Hokkaido Consadole Sapporo | Return from loan | |
| 02 ene 2021 | Hokkaido Consadole Sapporo | Kyoto | Loan | |
| 01 ene 2018 | Ehime | Hokkaido Consadole Sapporo | Free agent |
K. Shirai career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.