Tomoya Koyamatsu

Koyamatsu's current-season form is up 218% on last season (Season 11→35), while his Rating held around 30. His peak season for form remains 2021/22 (Season 38).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2025/26	Kashiwa Reysol · 2nd	37	3	10	7.05	30	35
2024/25	Kashiwa Reysol · 17th	33	0	1	6.59	30	11
2023/24	Kashiwa Reysol · 17th	30	1	1	6.62	33	19
2022/23	Kashiwa Reysol · 7th	33	4	5	6.76	45	29
2021/22	Sagan Tosu · 7th	37	6	3	6.85	52	38

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 7 earlier seasons in the full career.

Scout report

Experienced headCreative Attacking midfielder

T. Koyamatsu is a 31-year-old attacking midfielder at Kashiwa Reysol, enjoying a standout season — 3 goals and 10 assists in 37 appearances, a Season grade of 35, top 11% of J1 League attacking midfielders. On long-term scout potential he's rated 30.3, ranking 55th of 98 in the J1 League. A seasoned veteran, he has been a regular starter (78.5% of available minutes). He brings 0.44 goal contributions per 90 (0.1 goals, 0.34 assists). Below: strengths, watch-points, market-value outlook and the latest transfer news on Koyamatsu.

Judged on this season alone, Koyamatsu graded 35 — an excellent campaign that ranks top 12% of the 9 attacking midfielders in the J1 League, on 3 goals and 10 assists in 37 appearances (0.436 involvements per 90).

Year-on-year, that's a clear step up on last season (Season 11 → 35). Over the 6 seasons on record his form has held fairly steady, peaking in 2021/22.

On long-term talent our Rating reads 30, 6th of 9 of the 9 attacking midfielders in the J1 League. At 31 Koyamatsu is into the veteran stage, where the age curve weighs on the projection, and a market index of 6.2 reflects that trajectory.

From the career report

Read the full career report →

Below his 2021/22 peak but holding a solid level — the platform for a return is there.

Peak: 2021/22Trending upBreakout: 2025/26

Current potential6th of 9 attacking midfielders · J1 League Current seasonTop 12% attacking midfielders · J1 League 1st-best attacking midfielder in the J1 League 55th in the J1 League · potential 6th-highest potential attacking midfielder in the J1 League

30.3

Ratingi

6th of 9 attacking midfielders

34.6

Seasoni

developing / rotation level

78.5%

Minutes

a regular starter

0.44

Goal contrib / 90

productive for the role

Output in context · Kashiwa Reysol finished 2nd of 20 · a title-challenging side

Apps

Goals

Assists

G+A

0.08

Goals / app

3 goals in 37 appearances (0.08 per game) — light end product the role wants to see climb. He also laid on 10 assists, so the all-round involvement reads 13 goal contributions (0.35 per appearance).

Strengths

Availability. On the pitch for 78.5% of available minutes — a dependable presence in the XI.
Final-third output. 0.44 goal contributions per 90 (0.1 goals, 0.34 assists) — productive for the role.

Watch points

Defensive numbers. Modest 1.51 defensive actions per 90 for the position.
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

With a Rating of 30.3, Koyamatsu carries the 6th-highest potential of the attacking midfielders in the J1 League of 9. In the final third he profiles as a productive contributor (0.44 goal contributions 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.

Per 90 & availability

Minutes played %78.5%

Available fixtures38 of 38

Goals / 900.101

Assists / 900.335

Goal contribution / 900.436

Defensive actions / 901.509

Player flow

Goal involvements13

Cards / 900.034

Season-by-season progression

Rating (potential)Season (form)

Value & potential by age

Market valueRating

Solid = now · dashed = projected

The gold line is market value — an index (not €) blending rating, age and league. It climbs through the early 20s, peaks around ages 23–27 (~14), then tapers with age. At 31, Koyamatsu sits on 6.2, past its peak and easing. The blue line is Koyamatsu's projected Rating — 30.3 today — recomputed at each age, so it follows the same rise-and-fall as a career matures and declines. Solid = up to today; dashed = projected.

Season statistics

Bars = where he ranks among attacking midfielders in the J1 League with 600+ minutes this season.

Shooting

Goals3

Passing

Assists10

Defending

Tackles29—

Interceptions14—

Blocks2—

Yellow/red cards

Yellow cards1

Red cards0

Transfer history

Nagoya GrampusJan 2026 – now-

Kashiwa ReysolJan 2022 – Jan 2026

Sagan TosuJan 2020 – Jan 2022

Kyoto SangaJan 2017 – Jan 2020

Nagoya Grampusuntil Jan 2017

About T. Koyamatsu

Tomoya Koyamatsu is a 31-year-old attacking midfielder who plays for Nagoya Grampus, born on April 24, 1995 in Kyoto, standing 171 cm tall. He is from Japan. Nagoya Grampus currently sit 13th of 20 in the J1 League.

This season

In the current season, T. Koyamatsu has made 37 appearances with 3 goals and 10 assists across 2,684 minutes, with 1 yellow card.

T. Koyamatsu's next match is on August 29, 2026, when Nagoya Grampus face Fagiano Okayama at home in the J1 League.

Field Insider's view

Field Insider currently rates T. Koyamatsu at 30.3 with a Season form score of 34.6, ranking 55th of 98 attacking midfielders in the J1 League. See the full scout report for strengths, watch-points and the market-value outlook.

Career

Across 12 recorded seasons, T. Koyamatsu has totalled 347 club appearances with 40 goals and 23 assists for 4 different clubs. His busiest campaign came in 2019/20, with 42 appearances for Kyoto Sanga.

T. Koyamatsu's career has also included time at Kashiwa Reysol, Sagan Tosu and Kyoto Sanga.

Transfer news

No transfer news found for this player.

Profile

Season stats

Career

Scout report

Output in context · Kashiwa Reysol finished 2nd of 20 · a title-challenging side

Strengths

Watch points