Taiyo Koga

Koga's current-season form is level with last season (Season 69→69), while his Rating held around 50. His peak season for form remains 2025/26 (Season 69).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2027/28	Kashiwa Reysol · 2nd	3	0	0	7.17	50	69
2026/27	Kashiwa Reysol	20	1	0	7.06	—	—
2025/26	Kashiwa Reysol · 2nd	38	0	0	7.29	50	69
2024/25	Kashiwa Reysol · 17th	37	1	0	6.84	52	24
2023/24	Kashiwa Reysol · 17th	33	0	1	7	53	36

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 6 earlier seasons in the full career.

Japan · international

Side	Apps	G
Japan	3	0
Japan U23	3	0
Japan U22	1	0

Career caps & goals — tournament breakdown in the full career.

Scout report

Solid contributorCentral defender

T. Koga is a 27-year-old central defender at Kashiwa Reysol, enjoying a standout season — 0 goals and 0 assists in 38 appearances, a Season grade of 69. On long-term scout potential he's rated 49.8. In his prime years, he has been an ever-present (100% of available minutes). His defensive output reads 3.76 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Koga.

On the season, Koga graded 69 for current form (age-blind), on 19 clean sheets and 3.763 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 69 → 69). Over the 7 seasons on record his form has trended upward, peaking in 2025/26.

On long-term talent our Rating reads 50. At 27 Koga is in his prime years, and a market index of 22.7 reflects that trajectory.

From the career report

Read the full career report →

A career still climbing — Koga is at his peak right now, and the curve hasn't flattened.

Peak: 2025/26Trending upBreakout: 2025/26

49.8

Ratingi

a solid contributor and squad regular

69.2

Seasoni

a strong, regular top-tier starter

100%

Minutes

near ever-present

3.76

Def. actions / 90

solid defensive volume

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

Apps

3.76

Def. / 90

Tackles

Interceptions

Clean sheets

3.76 tackles, blocks & interceptions per 90 — solid defensive volume, with 19 clean sheets across 38 appearances. Behind a title-challenging side (2nd of 20) the side controls more games, so the defensive load is lighter — the value sits as much in composure and ball progression as in raw volume.

Strengths

Availability. On the pitch for 100% of available minutes — a dependable presence in the XI.
Defensive volume. 3.76 tackles, blocks & interceptions per 90 — does the unseen work.

Watch points

Few red flags. No obvious weaknesses in the current-season profile — consistency is the next test.

Outlook

Rated 49.8 overall — a solid contributor and squad regular. Defensively he reads as solid defensive volume (3.76 tackles, blocks & interceptions per 90). In the prime window — at or near peak market value, so the next two seasons are the ones to cash in or build around.

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

Per 90 & availability

Minutes played %100%

Available fixtures38 of 38

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 903.763

Player flow

Goal involvements0

Cards / 900.053

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 (~23), then tapers with age. At 27, Koga sits on 22.7, at or near its peak. The blue line is Koga's projected Rating — 49.8 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 centre-backs in the J1 League with 600+ minutes this season.

Shooting

Goals0

Passing

Assists0

Defending

Tackles62

Interceptions47

Blocks34

Yellow/red cards

Yellow cards2

Red cards0

Transfer history

Kashiwa Reysol(back from loan)Jan 2019 – now

Avispa Fukuoka(on loan)Jun 2018 – Jan 2019

Kashiwa Reysoluntil Jun 2018

About T. Koga

Taiyo Koga is a 27-year-old centre-back who plays for Kashiwa Reysol, born on October 28, 1998 in Chiba, standing 182 cm tall. He is from Japan. Kashiwa Reysol currently sit 2nd of 20 in the J1 League.

This season

In the current season, T. Koga has made 3 appearances with 0 goals and 0 assists across 270 minutes.

T. Koga's next match is on August 29, 2026, when Kashiwa Reysol face Shimizu S-pulse away in the J1 League.

Field Insider's view

Field Insider currently rates T. Koga at 49.8 with a Season form score of 69.2. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 4 career titles — among them the EAFF E-1 Football Championship and the J2 League. Full list in the career record.

Career

Across 11 recorded seasons, T. Koga has totalled 298 club appearances with 4 goals and 3 assists for 2 different clubs. His busiest campaign came in 2025/26, with 38 appearances for Kashiwa Reysol.

T. Koga's career has also included time at Avispa Fukuoka.

On the international stage, T. Koga has represented Japan, Japan U23, Japan U22 — 7 caps in our records.

Transfer news

No transfer news found for this player.