Kosei Tani

Tani's current-season form is level with last season (Season 42→42), 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 · 1st	7	1	14%	6.84	56	42
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 56.3 overall by Field Insider's model, ranking 3rd of 113 on scout potential in the J1 League. In his prime years, he has been an ever-present this season (97.4% of available minutes). Below: strengths, watch-points, market-value outlook and the latest transfer news on Tani.

Judged on this season alone, Tani graded 42 — a strong campaign that ranks top 16% of the 25 goalkeepers in the J1 League, on 14 clean sheets across 37 appearances.

Year-on-year, that's broadly in line with last season (Season 42 → 42). Over the 7 seasons on record his form has trended upward, peaking in 2024/25.

On long-term talent our Rating reads 56, top 4% of the 25 goalkeepers in the J1 League. At 25 Tani is in his prime years, and a market index of 19.2 reflects that trajectory.

From the career report

Read the full career report →

Below his 2024/25 peak but holding a solid level — the platform for a return is there.

Peak: 2024/25Trending upBreakout: 2024/25Streaky

Current potentialTop 4% goalkeepers · J1 League Current seasonTop 16% goalkeepers · J1 League 4th-best goalkeeper in the J1 League 3rd in the J1 League · potential 1st-highest potential goalkeeper in the J1 League

56.3

Ratingi

1st of 25 goalkeepers

42.2

Seasoni

developing / rotation level

97.4%

Minutes

near ever-present

Def. actions / 90

light defensive volume

Output in context · Machida Zelvia finished 6th of 20 · an upper-table side

Apps

Clean sheets

38%

CS rate

97.4%

Minutes

14 clean sheets in 37 appearances (38% 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.

Strengths

Availability. On the pitch for 97.4% of available minutes — a dependable presence in the XI.

Watch points

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

Outlook

With a Rating of 56.3, Tani carries the 1st-highest potential of the goalkeepers in the J1 League (top 4%). A near ever-present 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 %97.4%

Available fixtures38 of 38

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 900

Player flow

Goal involvements0

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 (~19), then tapers with age. At 25, Tani sits on 19.2, at or near its peak. The blue line is Tani's projected Rating — 56.3 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 goalkeepers in the J1 League with 600+ minutes this season.

Goalkeeping

Clean sheets14

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 1st of 20 in the J1 League.

This season

In the current season, K. Tani has made 7 appearances with 0 goals and 0 assists across 630 minutes.

K. Tani's next match is on September 20, 2026, when Machida Zelvia face Kashiwa Reysol at home in the J1 League.

Field Insider's view

Field Insider currently rates K. Tani at 56.3 with a Season form score of 42.2, ranking 3rd of 113 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 232 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 6th of 20 · an upper-table side

Strengths

Watch points