Louis Yamaguchi

Season	Club	Apps	CS	CS%	Match	RTG	Season
2026/27	Kawasaki Frontale	5	0	0%	6.64	—	—
2025/26	Kawasaki Frontale · 8th	35	7	20%	6.72	43	13
2024/25	Kawasaki FrontaleLoan	2	0	0%	—	—	—
2024/25	Machida Zelvia	1	0	0%	—	—	—
2023/24	Mito Hollyhock	29	0	0%	—	—	—
2022/23	Mito Hollyhock	34	0	0%	—	—	—

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

Japan · international

Side	Apps	G
Japan U22	1	0
Japan U21	2	0

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

Scout report

Project playerGoalkeeper

L. Yamaguchi is a 28-year-old goalkeeper at Kawasaki Frontale, rated 42.5 overall by Field Insider's model, ranking 18th of 98 on scout potential in the J1 League. An experienced operator, he has been an ever-present this season (91.8% of available minutes). Below: strengths, watch-points, market-value outlook and the latest transfer news on Yamaguchi.

Judged on this season alone, Yamaguchi graded 13 — a solid campaign that ranks top 37% of the 19 goalkeepers in the J1 League, on 7 clean sheets across 35 appearances.

We hold a single season for Yamaguchi, 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 43, top 27% of the 19 goalkeepers in the J1 League. At 28 Yamaguchi is in his prime years, and a market index of 7 reflects that trajectory.

Current potentialTop 27% goalkeepers · J1 League Current seasonTop 37% goalkeepers · J1 League 7th-best goalkeeper in the J1 League 18th in the J1 League · potential 5th-highest potential goalkeeper in the J1 League

42.5

Ratingi

5th of 19 goalkeepers

12.6

Seasoni

below regular-starter level

91.8%

Minutes

near ever-present

0.03

Def. actions / 90

light defensive volume

Output in context · Kawasaki Frontale finished 8th of 20 · a mid-table side

Apps

Clean sheets

20%

CS rate

91.8%

Minutes

7 clean sheets in 35 appearances (20% of games).

Strengths

Availability. On the pitch for 91.8% of available minutes — a dependable presence in the XI.

Watch points

Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 42.5, Yamaguchi carries the 5th-highest potential of the goalkeepers in the J1 League (top 27%). A near ever-present keeper carrying the gloves this season. Experienced and reliable, but the value curve is easing (1.2× now → 0.9× projected in three years).

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

Per 90 & availability

Minutes played %91.8%

Available fixtures38 of 38

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 900.029

Player flow

Goal involvements0

Cards / 900.029

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 (~12), then tapers with age. At 28, Yamaguchi sits on 7, past its peak and easing. The blue line is Yamaguchi's projected Rating — 42.5 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 sheets7

Yellow/red cards

Yellow cards1

Red cards0

Transfer history

Machida Zelvia(back from loan)Jan 2025 – now

Kawasaki FrontaleJan 2025 – Jan 2025

Machida ZelviaJan 2024 – Jan 2025

Mito HollyhockJan 2022 – Jan 2024Free

RRecreativo Huelvauntil Jan 2022

EExtremaduraJul 2017 – Jan 2022

Lorientuntil Jul 2017

About L. Yamaguchi

Louis Takaji Julien Thébault Yamaguchi is a 28-year-old goalkeeper who plays for Kawasaki Frontale, born on May 28, 1998 in La Garenne-Colombes, standing 186 cm tall. He is from Japan. Kawasaki Frontale currently sit 14th of 20 in the J1 League.

This season

In the current season, L. Yamaguchi has made 35 appearances with 0 goals and 0 assists across 3,141 minutes, with 1 yellow card.

L. Yamaguchi's next match is on August 29, 2026, when Kawasaki Frontale face JEF United Chiba at home in the J1 League.

Field Insider's view

Field Insider currently rates L. Yamaguchi at 42.5 with a Season form score of 12.6, ranking 18th of 98 goalkeepers in the J1 League. See the full scout report for strengths, watch-points and the market-value outlook.

Career

Across 8 recorded seasons, L. Yamaguchi has totalled 144 club appearances with 0 goals and 0 assists for 6 different clubs. His busiest campaign came in 2025/26, with 35 appearances for Kawasaki Frontale.

L. Yamaguchi's career has also included time at Machida Zelvia, Mito Hollyhock, RRecreativo Huelva, EExtremadura and Lorient.

On the international stage, L. Yamaguchi has represented Japan U22 and Japan U21 — 3 caps in our records.

Transfer news

No transfer news found for this player.

Profile

Season stats

Career

Scout report

Output in context · Kawasaki Frontale finished 8th of 20 · a mid-table side

Strengths

Watch points