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Most Improved defenders in J3 League 2026

The most improved defenders in J3 League in 2026, ranked on Field Insider.

Most improved goalkeepers in J3 LeagueMost improved midfielders in J3 LeagueMost improved attackers in J3 LeagueBest defenders in J3 LeagueMost in-form defenders in J3 LeagueTop-scoring defenders in J3 League

At a glance

Ri Thae-Ha of Roasso Kumamoto is the standout for raw talent across defenders in J3 League, with a Field Insider Rating of 35.4, and R. Kawakami has been the form player this season, grading 24.2, and Y. Tsukegi leads the scoring with 3 goals.

The numbers a scout watches are the year-on-year jumps: Y. Hasegawa has improved his Season rating most, up +9.1 on last season. Those are the players whose trajectory is bending upward fastest.

By our market-value index, H. Iwasaki of Tochigi SC is the most valuable name in this group at 4.6.

Best talent
Ri Thae-Ha35.4RTG
Roasso Kumamoto
In form
R. Kawakami24.2SsN
Osaka
Rising potential
K. Kitazume-6RTG
Matsumoto Yamaga · 22/23→25/26
Most improved
Y. Hasegawa+9.1SsN
Parceiro Nagano · 21/22→25/26
Top scorer
Y. Tsukegi3goals
Kamatamare Sanuki
Most valuable
H. Iwasaki4.6val
Tochigi SC
7 players · ranked by most improvedCustomise →
PlayerTeam
1Y. HasegawaFull-backParceiro Nagano29+9.1
21/22→25/26
16124.7%1760.8%
2K. KitazumeFull-backMatsumoto Yamaga34+5.4
22/23→25/26
1277.1%1627.4%
3D. SuzukiCentre-backNara Club30+3.7
21/22→25/26
7115.6%1563.4%
4K. MatsudaCentre-backRenofa Yamaguchi26+2.1
24/25→25/26
656.8%3223.5%
5N. YamamotoCentre-backKanazawa31-5.9
22/23→25/26
1134.7%1464%
6K. OiwaCentre-backRenofa Yamaguchi37-10.6
24/25→25/26
377.9%846.6%
7M. KamekawaCentre-backRenofa Yamaguchi33-13.3
24/25→25/26
573.1%1053.9%