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

Project playerCentre-forward

K. Arima is a 26-year-old centre-forward at Oita Trinita, rated 38.7 overall by Field Insider's model, ranking 34th of 215 on scout potential in the J2 League. In his prime years, he has been a regular starter this season (65.7% 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 21 — a solid campaign that ranks top 39% of the 39 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 39, top 21% of the 39 centre-forwards in the J2 League. At 26 Arima is in his prime years, and a market index of 7 reflects that trajectory.

Current potential8th of 39 centre-forwards · J2 League · 13 apps Current season15th of 39 centre-forwards · J2 League · 13 apps 15th-best centre-forward in the J2 League 34th in the J2 League · potential 8th-highest potential centre-forward in the J2 League

38.7

Ratingi

8th of 39 centre-forwards

21.4

Seasoni

below regular-starter level

65.7%

Minutes

a regular starter

0.24

Goal contrib / 90

modest end product

Output in context · Oita Trinita finished 7th of 20 · a mid-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.

Strengths

Availability. On the pitch for 65.7% of available minutes — a dependable presence in the XI.

Watch points

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 38.7, Arima carries the 8th-highest potential of the centre-forwards in the J2 League of 39 — 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). 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 %65.7%

Available fixtures13 of 11

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 (~7), then tapers with age. At 26, Arima sits on 7, at or near its peak. The blue line is Arima's projected Rating — 38.7 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 7th 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 October 31, 2026, when Oita Trinita face Tegevajaro Miyazaki away in the J2 League.

Field Insider's view

Field Insider currently rates K. Arima at 38.7 with a Season form score of 21.4, ranking 34th of 215 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 7th of 20 · a mid-table side

Strengths

Watch points