Field Insider
18.1
±0%
Ratingi
2.5
78.6%
Seasoni
1.1
Valuei

ratings updated 13 Oct 2026

Profile

Full nameWilliam Popp
PositionGoalkeeper
NationalityJapan
Age32
Date of birth21 Oct 1994
BirthplaceHino
Height192 cm
Shirt number#1
ClubShonan Bellmare
More about W. Popp →
Goalkeeper

Season stats

Full career & schedule →
7
Appearances
1
Clean sheets
14%
CS rate
share of apps kept clean
630
Minutes

Domestic-league season · Shonan Bellmare.

Performance data · by competition

CompetitionAppsMinMatch
Challenger Pro Leagueat Beerschot VA3906.53

Scout report

★ Standout performer

All J2 League standouts →

One of the biggest game-time risers in the J2 League: on the pitch for 100% of Shonan Bellmare's available minutes this season, up from 18% last year — a bench-to-starter jump the ratings will catch up with at the next checkpoint.

Experienced headGoalkeeper

W. Popp is a 32-year-old goalkeeper at Shonan Bellmare, rated 15.2 overall by Field Insider's model, ranking 160th of 215 on scout potential in the J2 League. A seasoned veteran, he has been a rotation option this season (36.8% of available minutes). Below: strengths, watch-points, market-value outlook and the latest transfer news on Popp.

Judged on this season alone, Popp graded 3 — a workmanlike campaign that ranks 16th of 18 of the 18 goalkeepers in the J2 League, on 1 clean sheet across 7 appearances.

Year-on-year, that's broadly in line with last season (Season 1 → 3). Over the 4 seasons on record his form has drifted down, peaking in 2024/25.

On long-term talent our Rating reads 15, 8th of 18 of the 18 goalkeepers in the J2 League. At 32 Popp is into the veteran stage, where the age curve weighs on the projection, and a market index of 1.1 reflects that trajectory.

From the career report
Read the full career report →

Popp is operating at his career peak — the 2024/25 level is the level.

Peak: 2024/25Holding level4 clubs
Current potential8th of 18 goalkeepers · J2 League · 7 appsCurrent season16th of 18 goalkeepers · J2 League · 7 apps16th-best goalkeeper in the J2 League160th in the J2 League · potential8th-highest potential goalkeeper in the J2 League
15.2
Ratingi
8th of 18 goalkeepers
2.5
Seasoni
below regular-starter level
36.8%
Minutes
rotation minutes
0
Def. actions / 90
light defensive volume

Output in context · Shonan Bellmare finished 6th of 20 · an upper-table side

7
Apps
1
Clean sheets
14%
CS rate
36.8%
Minutes

1 clean sheet in 7 appearances (14% of games). Playing behind an upper-table side (6th of 20) means a more protected goal, so the read is about command and distribution as much as raw shut-outs.

Watch points

  • Game time. Only 36.8% of available minutes — needs a settled run to prove the level.
  • Age curve. At 32, both level and resale value are on the downslope.
  • Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 15.2, Popp carries the 8th-highest potential of the goalkeepers in the J2 League of 18 — though on just 7 appearances this season, so the standing rests on a small sample. A rotation minutes keeper carrying the gloves this season. Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.8× and falling).

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

Season statistics

Bars = where he ranks among goalkeepers in the J2 League with 600+ minutes this season.

Goalkeeping

Clean sheets1

Distribution

Passes179—

Yellow/red cards

Yellow cards0
Red cards0

Transfer news

No transfer news found for this player.