Field Insider
Defensive midfielderJapanJ1 League

Kei Koizumi

Experienced headShimizu S-pulse · 31 yrsFringe playerNew signing
23.1
1.7%
Ratingi
3
87.4%
Seasoni
2.1
Valuei

based on the 2026 season · updated 19 Oct 2026

Profile

Full nameKei Koizumi
PositionDefensive midfielder
NationalityJapan
Age31
Date of birth19 Apr 1995
BirthplaceTokyo
Height173 cm
Shirt number#37
ClubShimizu S-pulse
More about K. Koizumi →
Defensive midfielder

Season stats

Full career & schedule →
5
Appearances
0
Goals
0
Assists
162
Minutes

Domestic-league season · Shimizu S-pulse.

Also this season

Earlier this season at FC Tokyo — J-League Cup: 3 apps, 0g 0a, 187 min

The headline Season rating covers his time at Shimizu S-pulse; availability counts only fixtures while in this squad.

Performance data · by competition

CompetitionAppsGAMinMatch
J1 League100146.7

Scout report

Experienced headBall-winning Defensive midfielder

K. Koizumi is a 31-year-old defensive midfielder at Shimizu S-pulse, rated 17.3 overall by Field Insider's model. A seasoned veteran, he has been a fringe squad member this season (9.5% of available minutes). His defensive output reads 4.44 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Koizumi.

On the season, Koizumi graded 3 for current form (age-blind), on 0 goals, 0 assists and 4.444 defensive actions per 90.

Year-on-year, that's a drop on last season (Season 24 → 3). Over the 7 seasons on record his form has drifted down, peaking in 2022/23.

On long-term talent our Rating reads 17. At 31 Koizumi is into the veteran stage, where the age curve weighs on the projection, and a market index of 2.1 reflects that trajectory.

From the career report
Read the full career report →

Below his 2022/23 peak but holding a solid level — the platform for a return is there.

Peak: 2022/23Holding levelBreakout: 2022/23Remarkably consistent4 clubs
17.3
Ratingi
below regular-starter level
3
Seasoni
below regular-starter level
9.5%
Minutes
limited game time
4.44
Def. actions / 90
solid defensive volume

Output in context · Shimizu S-pulse finished 10th of 20 · a mid-table side

5
Apps
4.44
Def. / 90
6
Tackles
1
Interceptions
0
Clean sheets

4.44 tackles, blocks & interceptions per 90 — solid defensive volume across 5 appearances.

Strengths

  • Defensive volume. 4.44 tackles, blocks & interceptions per 90 — does the unseen work.

Watch points

  • Game time. Only 9.5% of available minutes — needs a settled run to prove the level.
  • Age curve. At 31, both level and resale value are on the downslope.
  • Level. Rates below a nailed-on top-tier starter on our model.

Outlook

Rated 17.3 overall — below regular-starter level. Defensively he reads as solid defensive volume (4.44 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.9× and falling).

Generated from Field Insider's rating model · AI-written analysis to follow.

Transfer news

No transfer news found for this player.