| Kazuma Nagai 長井 一真 | |
| Birth Date: | 2 November 1998 |
| Birth Place: | Toyonaka, Osaka, Japan |
| Height: | 1.80 m |
| Currentclub: | Mito HollyHock |
| Clubnumber: | 88 |
| Position: | Defender |
| Youthclubs1: | Osaka Central FC |
| Youthyears2: | –2016 |
| Youthclubs2: | Kokoku HS |
| Youthyears3: | 2017–2020 |
| Youthclubs3: | Kansai University |
| Years1: | 2020–2023 |
| Caps1: | 25 |
| Goals1: | 0 |
| Years2: | 2023– |
| Clubs2: | Mito HollyHock |
| Caps2: | 19 |
| Goals2: | 1 |
| Club-Update: | 23:05, 2 November 2023 (UTC) |
is a Japanese professional footballer who plays as a defender for club Mito HollyHock.
.[1]
| Club | Season | League | National Cup | League Cup | Other | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Division | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | |||
| Japan | League | Emperor's Cup | J. League Cup | Other | Total | ||||||||
| Kyoto Sanga | 2020 | J2 League | 3 | 0 | 0 | 0 | – | – | 3 | 0 | |||
| 2021 | J2 League | 12 | 0 | 3 | 0 | – | – | 15 | 0 | ||||
| 2022 | J1 League | 10 | 0 | 2 | 0 | 5 | 0 | – | 17 | 0 | |||
| Total | 25 | 0 | 5 | 0 | 5 | 0 | 0 | 0 | 35 | 0 | |||
| Mito Hollyhock | 2023 | J2 League | 19 | 1 | 1 | 0 | – | – | 20 | 1 | |||
| Career total | 44 | 1 | 6 | 0 | 5 | 0 | 0 | 0 | 55 | 1 | |||