Naoki Tsubaki

Tsubaki's current-season form is level with last season (Season 9→9), while his Rating held around 36. His peak season for form remains 2025/26 (Season 9).

Domestic career

Season	Club	Apps	G	Match	RTG	Season
2027/28	JEF United Chiba · 20th	1	0	6.3	36	9
2026/27	JEF United Chiba	4	0	6.5	—	—
2025/26	JEF United Chiba · 3rd	15	3	—	36	9
2024/25	JEF United Chiba	22	5	—	—	—
2023/24	JEF United Chiba	25	2	—	—	—

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

Japan · international

Side	Apps	G
Japan U17	3	0

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

Scout report

Squad depthCentral midfielder

N. Tsubaki is a 26-year-old central midfielder at JEF United Chiba, rated 35.6 overall by Field Insider's model. In his prime years, he has been a fringe squad member this season (31.9% of available minutes). Below: strengths, watch-points, market-value outlook and the latest transfer news on Tsubaki.

On the season, Tsubaki graded 9 for current form (age-blind), on 3 goals, 0 assists and 0 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 9 → 9).

On long-term talent our Rating reads 36. At 26 Tsubaki is in his prime years, and a market index of 6.4 reflects that trajectory.

35.6

Ratingi

developing / rotation level

9.4

Seasoni

below regular-starter level

31.9%

Minutes

limited game time

Def. actions / 90

light defensive volume

Output in context · JEF United Chiba finished 3rd of 20 · an upper-table side

Apps

Def. / 90

—

Tackles

—

Interceptions

Clean sheets

0 tackles, blocks & interceptions per 90 — light defensive volume, with 5 clean sheets across 15 appearances. Behind an upper-table side (3rd 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. Going forward he chipped in 3 goals and 0 assists — a useful bonus from the back.

Strengths

Attacking threat. Chips in from deep: 0.24 goal involvements per 90, useful for a central midfielder.

Watch points

Game time. Only 31.9% of available minutes — needs a settled run to prove the level.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

Rated 35.6 overall — developing / rotation level. Defensively he reads as light defensive volume (0 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 %31.9%

Available fixtures40 of 40

Goals / 900.235

Assists / 900

Goal contribution / 900.235

Defensive actions / 900

Player flow

Goal involvements3

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 (~10), then tapers with age. At 26, Tsubaki sits on 6.4, at or near its peak. The blue line is Tsubaki's projected Rating — 35.6 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 central midfielders in the J1 League with 600+ minutes this season.

Shooting

Goals3

Passing

Assists0

Yellow/red cards

Yellow cards0

Red cards0

Transfer history

JEF United ChibaJan 2023 – now

Yokohama F. Marinos(back from loan)Jan 2023 – Jan 2023

Mito Hollyhock(on loan)Feb 2022 – Jan 2023

Yokohama F. Marinosuntil Feb 2022

KitakyushuAug 2019 – Feb 2022

Yokohama F. Marinosuntil Aug 2019

About N. Tsubaki

Naoki Tsubaki is a 26-year-old central midfielder who plays for JEF United Chiba, born on June 23, 2000 in Tokyo, standing 172 cm tall. He is from Japan. JEF United Chiba currently sit 20th of 20 in the J1 League.

This season

In the current season, N. Tsubaki has made 1 appearances with 0 goals and 0 assists across 11 minutes.

N. Tsubaki's next match is on August 29, 2026, when JEF United Chiba face Kawasaki Frontale away in the J1 League.

Field Insider's view

Field Insider currently rates N. Tsubaki at 35.6 with a Season form score of 9.4. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 2 career titles — among them the A-League Men and the J3 League. Full list in the career record.

Career

Across 9 recorded seasons, N. Tsubaki has totalled 171 club appearances with 16 goals and 0 assists for 5 different clubs. His busiest campaign came in 2022/23, with 37 appearances for Mito Hollyhock.

N. Tsubaki's career has also included time at Yokohama F. Marinos, Mito Hollyhock and Kitakyushu.

On the international stage, N. Tsubaki has represented Japan U17 — 3 caps in our records.

Transfer news

No transfer news found for this player.