Ayumu Seko has grown from a highly rated Cerezo Osaka academy talent into a reliable Japanese defender in European football.
Fans want to know just how he plays, but how much he earns and what his finances look like.
In this guide, you will learn Ayumu Seko’s net worth, his Le Havre salary, contract details, career earnings, and the key milestones that shaped his career.
Ayumu Seko’s Biography
| Detail | Info |
|---|---|
| Full Name | Ayumu Seko (瀬古 歩夢) |
| Date of Birth | June 7, 2000 |
| Age | 25 years old |
| Nationality | Japanese |
| Place of Birth | Osaka, Japan |
| Height | 1.83 m (6 ft 0 in) |
| Weight | 72 kg (approx. 159 lbs) |
| Position | Central defender / defensive midfielder |
| Current Club | Le Havre AC (Ligue 1, France) |
| Turned Professional | 2016 with Cerezo Osaka |
| Net Worth | Estimated €2.0 million |
| Salary | €1.04 million base per year at Le Havre |
| Contract | Le Havre, July 2025 to June 2027 |
| Market Value | €5.0 million (Transfermarkt) |
| Verified Role | Japan national team defender |
Early Life And Career
Ayumu Seko was born in Osaka, one of Japan’s biggest football cities, on June 7, 2000. He grew up in the Taisho Ward of Osaka and fell in love with the game at a young age, playing for local sides before entering a professional youth setup.
A childhood friend, Masaki Ikeda, joined the Cerezo Osaka junior program, and that move encouraged Seko to attend trials himself. He passed the selection for Cerezo Osaka U-12 in 2010, which became the real starting point of his structured football path.
Through his school years he balanced education with football. He played for Cerezo Osaka U-15 while he studied at Taisho Higashi Junior High School, then continued to Kokoku High School while remaining in the club’s academy system.
Coaches quickly noticed his calm style and strong reading of the game.
By 2017, then Cerezo Osaka manager Yoon Jong-hwan invited him to train with the first team, a rare chance for a teenager and a clear sign of trust in his potential.
That fast rise led to his senior debut for Cerezo Osaka in the J.League Cup on May 24, 2017, against Vissel Kobe. He came on as a substitute and became the youngest player to appear in a cup match for Cerezo, underlining how highly the club rated him.
His first J1 League appearance came later, on May 4, 2019, against Matsumoto Yamaga, where he started in central defense in a 2–0 win.
Professional Career
Seko signed his first professional contract with Cerezo Osaka in 2016 and spent his early years moving between the senior team and the U-23 side in the J3 League.
Over time he grew into an important figure in the first team. According to the career stats compiled on Wikipedia and Footballdatabase, he played 94 competitive matches and scored 2 goals for Cerezo Osaka across all competitions.
In 2021, Seko made the jump to Europe by joining Grasshopper Club Zürich in the Swiss Super League. Switzerland gave him regular minutes in a physically demanding league.
FootyStats data shows that by 2024 he had played 241 official matches in his career, with 5 goals and 3 assists, and most of those appearances came in the Swiss Super League with Grasshopper.
His time in Zürich helped him grow as a central defender and defensive midfielder, comfortable in a back four or back three.
In July 2025, Seko’s solid performances attracted interest from France. He joined Ligue 1 club Le Havre AC on a free transfer after his Grasshopper contract ended, as confirmed by FootballTransfers and a widely shared update from Fabrizio Romano.
FootballTransfers lists his transfer value between €1.2 million and €1.8 million, while Transfermarkt sets his official market value at €5.0 million in the 2025–26 season.
At Le Havre, he has settled into the heart of their defense and earned regular starts in France’s top flight, with FotMob tracking his Ligue 1 minutes, passing and defensive numbers.
On the international stage, Seko first appeared in Japan senior team plans in early 2022 when he received a call-up for a friendly against Uzbekistan, though that match was cancelled.
In March 2023 he finally debuted for the Samurai Blue against Uruguay, playing the full match in a 1–1 draw.
By late 2025 he had accumulated 12 caps for Japan without scoring, featuring in friendlies and qualifiers.
He also appeared for Japan’s youth teams, including the U-20 and Olympic squads, underlining his status in the national setup.
Ayumu Seko’s Net Worth Details
As of 2026, Ayumu Seko’s has an estimated net worth of €2.0 million.
He built this wealth mainly through professional contracts with Cerezo Osaka, Grasshopper Club Zürich, and his current deal with Ligue 1 side Le Havre AC, where he earns a seven‑figure gross salary.
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Contract
Salary database SalaryLeaks confirms that Seko signed a two‑year contract with Le Havre on July 22, 2025, running until June 2027.
The total value of this contract is €2.3 million over two seasons, including fixed wages and performance-related bonuses.
FootballTransfers adds that Le Havre acquired him on a free transfer after the end of his Grasshopper deal, which allowed the French club to channel more of their budget into his salary package rather than a transfer fee.
Salary
According to SalaryLeaks, Seko earns a base salary of €1.04 million per year, which equals €20,000 per week in gross wages.
On top of that, he can earn €124,800 per year in bonuses, tied to playing time and performance clauses, taking his potential annual earnings to around €1.16 million.
These numbers place him among the better paid players at Le Havre, a club whose estimated total wage bill sits in the mid-range for Ligue 1 teams, as shown by the Le Havre salary overview on Capology.
Before moving to France, his salaries at Cerezo Osaka and Grasshopper were lower but still solid for a young professional.
Swiss and J1 League wage structures typically pay less than top‑five European leagues, so the Le Havre move marks the most lucrative stage of his career so far.
Career Earnings By Year
| Season | Club | Estimated Annual Salary |
|---|---|---|
| 2016–2018 | Cerezo Osaka (youth/transition) | Minimal professional terms (not public) |
| 2019 | Cerezo Osaka | ~€120,000 (estimated J1 starter level) |
| 2020 | Cerezo Osaka | ~€150,000 (estimated) |
| 2021 | Cerezo Osaka | ~€200,000 (estimated as regular starter) |
| 2021–22 | Grasshopper | ~€300,000 (estimated Swiss Super League) |
| 2022–23 | Grasshopper | ~€350,000 (estimated) |
| 2023–24 | Grasshopper | ~€400,000 (estimated) |
| 2024–25 | Grasshopper | ~€450,000 (estimated) |
| 2025–26 | Le Havre | €1.04 million base + up to €124,800 bonuses |
| 2026–27 | Le Havre | €1.04 million base + up to €124,800 bonuses |
Career Statistics
| Club | Years | Competitions | Appearances | Goals | Assists |
|---|---|---|---|---|---|
| Cerezo Osaka (incl. U-23) | 2016–2021 | J1 League, J3 League, cups, continental | 94 | 2 | 1 |
| Grasshopper Club Zürich | 2021–2025 | Swiss Super League, Swiss Cup | 105 | 3 | 1 |
| Le Havre AC | 2025–2026 | Ligue 1 | 8 (early 25/26 season per FootyStats) | 0 | 0 |
| Club Career Total | 2016–2026 | All official competitions | 241 | 5 | 3 |
International Career Stats (Japan)
| Team | Years | Appearances | Goals |
|---|---|---|---|
| Japan U-20 | – | 4 | 0 |
| Japan Olympic | – | 1 | 0 |
| Japan Senior Team | 2023–2026 | 12 | 0 |
FAQs
What is Ayumu Seko’s net worth?
Ayumu Seko’s estimated net worth is about €2.0 million. He built this mainly through professional contracts with Cerezo Osaka, Grasshopper Club Zürich, and his current Ligue 1 deal at Le Havre AC.
How much does Ayumu Seko earn at Le Havre?
He earns a base salary of €1.04 million per year, which equals €20,000 per week, and he can add €124,800 per season in bonuses under his current contract with Le Havre.
What is Ayumu Seko’s contract length at Le Havre?
Ayumu Seko signed a two‑year contract with Le Havre on July 22, 2025. The deal runs from July 2025 to June 2027 and is worth around €2.3 million in total value.
Which clubs has Ayumu Seko played for?
He came through the Cerezo Osaka academy and played for their senior side in Japan, then moved to Grasshopper Club Zürich in Switzerland, and later joined Le Havre AC in France’s Ligue 1.
How many games has Ayumu Seko played in his career?
He has played about 241 official club matches, scoring 5 goals and providing 3 assists, with most games coming for Grasshopper in the Swiss Super League. He has also earned 12 caps for Japan.
