Kotaro Arima

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

Scout report

Squad depthCentre-forward

K. Arima is a 25-year-old centre-forward at Oita Trinita, rated 35.7 overall by Field Insider's model, ranking 38th of 226 on scout potential in the J2 League. In his prime years, he has been a fringe squad member this season (32.9% of available minutes). He brings 0.24 goal contributions per 90 (0.24 goals, 0 assists). Below: strengths, watch-points, market-value outlook and the latest transfer news on Arima.

Judged on this season alone, Arima graded 11 — a solid campaign that ranks top 38% of the 40 centre-forwards in the J2 League, on 3 goals and 0 assists in 13 appearances (0.24 involvements per 90).

We hold a single season for Arima, so there's no year-on-year comparison to draw yet — the read above is this campaign only.

On long-term talent our Rating reads 36, top 20% of the 40 centre-forwards in the J2 League. At 25 Arima is in his prime years, and a market index of 6.4 reflects that trajectory.

Current potential8th of 40 centre-forwards · J2 League · 13 apps Current season15th of 40 centre-forwards · J2 League · 13 apps 15th-best centre-forward in the J2 League 38th in the J2 League · potential 8th-highest potential centre-forward in the J2 League

35.7

Ratingi

8th of 40 centre-forwards

10.7

Seasoni

below regular-starter level

32.9%

Minutes

limited game time

0.24

Goal contrib / 90

modest end product

Output in context · Oita Trinita finished 16th of 20 · a lower-table side

Apps

Goals

Assists

G+A

0.23

Goals / app

3 goals in 13 appearances (0.23 per game) — light end product the role wants to see climb.

Watch points

Game time. Only 32.9% of available minutes — needs a settled run to prove the level.
Output. 0.24 contributions per 90 is light for an attacking role — end product needs to climb.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 35.7, Arima carries the 8th-highest potential of the centre-forwards in the J2 League of 40 — though on just 13 appearances this season, so the standing rests on a small sample. In the final third he profiles as a work-in-progress on end product (0.24 goal contributions per 90). 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 %32.9%

Available fixtures38 of 38

Goals / 900.24

Assists / 900

Goal contribution / 900.24

Defensive actions / 900

Player flow

Goal involvements3

Cards / 900.08

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 (~6), then tapers with age. At 25, Arima sits on 6.4, at or near its peak. The blue line is Arima's projected Rating — 35.7 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 centre-forwards in the J2 League with 600+ minutes this season.

Shooting

Goals3

Passing

Assists0

Yellow/red cards

Yellow cards1

Red cards0

Transfer history

Oita TrinitaJan 2025 – now

IwakiJan 2022 – Jan 2025Free

Kashima(back from loan)Jan 2022 – Jan 2022

Tochigi SC(on loan)Feb 2020 – Jan 2022

Kashimauntil Feb 2020

About K. Arima

Kotaro Arima is a 25-year-old centre-forward who plays for Oita Trinita, born on September 3, 2000, standing 181 cm tall. He is from Japan. Oita Trinita currently sit 9th of 20 in the J2 League.

This season

In the current season, K. Arima has made 13 appearances with 3 goals and 0 assists across 1,124 minutes, with 1 yellow card.

K. Arima's next match is on August 29, 2026, when Oita Trinita face Tokushima Vortis away in the J2 League.

Field Insider's view

Field Insider currently rates K. Arima at 35.7 with a Season form score of 10.7, ranking 38th of 226 centre-forwards in the J2 League. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 1 career title — among them the J3 League. Full list in the career record.

Career

Across 7 recorded seasons, K. Arima has totalled 131 club appearances with 21 goals and 0 assists for 4 different clubs. His busiest campaign came in 2024/25, with 38 appearances for Iwaki.

K. Arima's career has also included time at Iwaki, Kashima and Tochigi SC.

Transfer news

No transfer news found for this player.

Profile

Season stats

Career

Scout report

Output in context · Oita Trinita finished 16th of 20 · a lower-table side

Watch points