Kosei Tani

Tani's current-season form is down 60% on last season (Season 42→17), while his Rating held around 56. His peak season for form remains 2024/25 (Season 62).

Domestic career

Season	Club	Apps	CS	CS%	Match	RTG	Season
2027/28	Machida Zelvia · 2nd	10	3	30%	7.06	56	17
2026/27	Machida Zelvia	20	0	0%	7.52	—	—
2025/26	Machida Zelvia · 6th	37	14	38%	7.03	56	42
2024/25	Machida Zelvia · 3rd	37	17	46%	7.16	60	62
2023/24	DenderLoan · 2nd	1	0	0%	—	38	0
2023/24	Gamba Osaka · 16th	10	1	10%	6.46	44	1

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 4 earlier seasons and 2 youth-team spells in the full career.

Japan · international

Side	Apps	G
Japan	3	0
Japan U23	6	0
Japan U17	3	0

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

Scout report

League standoutGoalkeeper

K. Tani is a 25-year-old goalkeeper at Machida Zelvia, rated 46.7 overall by Field Insider's model, ranking 3rd of 193 on scout potential in the J1 League. In his prime years, he has been a rotation option this season (58.8% of available minutes). Below: strengths, watch-points, market-value outlook and the latest transfer news on Tani.

Judged on this season alone, Tani graded 18 — a strong campaign that ranks top 29% of the 28 goalkeepers in the J1 League, on 3 clean sheets across 10 appearances.

Year-on-year, that's a drop on last season (Season 42 → 17). Over the 7 seasons on record his form has held fairly steady, peaking in 2024/25.

On long-term talent our Rating reads 47, top 4% of the 28 goalkeepers in the J1 League. At 25 Tani is in his prime years, and a market index of 12.8 reflects that trajectory.

From the career report

Read the full career report →

Past his 2024/25 peak — the recent trend is downward, so buyers are paying for what's left, not what was.

Peak: 2024/25Trending downBreakout: 2024/25Streaky

Current potential1st of 28 goalkeepers · J1 League · 10 apps Current season8th of 28 goalkeepers · J1 League · 10 apps 8th-best goalkeeper in the J1 League 3rd in the J1 League · potential 1st-highest potential goalkeeper in the J1 League

46.7

Ratingi

1st of 28 goalkeepers

17.7

Seasoni

below regular-starter level

58.8%

Minutes

rotation minutes

0.1

Def. actions / 90

light defensive volume

Output in context · Machida Zelvia finished 2nd of 20 · a title-challenging side

Apps

Clean sheets

30%

CS rate

58.8%

Minutes

3 clean sheets in 10 appearances (30% of games). Playing behind a title-challenging side (2nd 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 58.8% of available minutes — needs a settled run to prove the level.

Outlook

With a Rating of 46.7, Tani carries the 1st-highest potential of the goalkeepers in the J1 League of 28 — though on just 10 appearances this season, so the standing rests on a small sample. A rotation minutes keeper carrying the gloves this season. Approaching peak years; value is still building (price multiplier 2×) with the best seasons likely ahead.

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

Per 90 & availability

Minutes played %58.8%

Available fixtures10 of 10

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 900.1

Player flow

Goal involvements0

Pass accuracy %63

Cards / 900

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 (~13), then tapers with age. At 25, Tani sits on 12.8, at or near its peak. The blue line is Tani's projected Rating — 46.7 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 goalkeepers in the J1 League with 600+ minutes this season.

Goalkeeping

Clean sheets3

Saves25

Save rate83.3%

Goals conceded5

Distribution

Passes369

Pass accuracy63%

Yellow/red cards

Yellow cards0

Red cards0

Transfer history

Gamba Osaka(back from loan)Jan 2025 – now

Machida ZelviaJan 2025 – Jan 2025

Machida Zelvia(on loan)Jan 2024 – Jan 2025

Dender(on loan)Aug 2023 – Jan 2024

Gamba Osaka(back from loan)Jan 2023 – Aug 2023

Shonan Bellmare(on loan)Jan 2020 – Jan 2023

Gamba Osakauntil Jan 2020

About K. Tani

Kosei Tani is a 25-year-old goalkeeper who plays for Machida Zelvia, born on November 22, 2000 in Sakai, standing 190 cm tall. He is from Japan. Machida Zelvia currently sit 2nd of 20 in the J1 League.

This season

In the current season, K. Tani has made 10 appearances with 0 goals and 0 assists across 900 minutes.

K. Tani's next match is on November 1, 2026, when Machida Zelvia face Gamba Osaka at home in the J1 League.

Field Insider's view

Field Insider currently rates K. Tani at 46.7 with a Season form score of 17.7, ranking 3rd of 193 goalkeepers in the J1 League. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 2 career titles — among them the EAFF E-1 Football Championship. Full list in the career record.

Career

Across 10 recorded seasons, K. Tani has totalled 235 club appearances with 0 goals and 0 assists for 5 different clubs. His busiest campaign came in 2024/25, with 37 appearances for Machida Zelvia.

K. Tani's career has also included time at Gamba Osaka, Dender and Shonan Bellmare.

On the international stage, K. Tani has represented Japan, Japan U23, Japan U17 — 12 caps in our records.

Transfer news

No transfer news found for this player.

Profile

Season stats

Performance data · by competition

Career

Scout report

Output in context · Machida Zelvia finished 2nd of 20 · a title-challenging side

Watch points