＜Player Profile＞
■Player Name: Kei Koizumi
■Born: April 19, 1995, Tokyo
■Height & Weight: 173 cm, 70 kg
■Position: MF
■Career:
Kashiwa Russell FC - Yokohama F. Marinos Primary - Yokohama F. Marinos Jr. Youth - Ryutsu Keizai University Kashiwa High School - Albirex Niigata (2014) - Kashiwa Reysol (2018)
■Official Match Records:
| J1 League Total | 137 appearances, 5 goals |
| J2 League Total | 1 appearance, 0 goals |
| J3 League Total (J-22 Selection) | 1 appearance, 0 goals |
| League Cup Total | 23 appearances, 1 goal |
| Emperor's Cup Total | 7 appearances, 1 goal |
| AFC Champions League | 3 appearances, 1 goal |
"Hello everyone. I'm Kei Koizumi, joining from Kashiwa Reysol. I'm delighted to be able to join Kashima Antlers, a club with such a rich tradition. I will do my best to contribute to the team's victories as soon as possible. I look forward to working with you all."