Kaishu Sano went from a mountain town in Okayama, Japan, to anchoring a Bundesliga midfield at just 25 years old.
This article breaks down his net worth, salary, career earnings, and everything you need to know about the player Mainz reportedly values at up to €60 million.
Kaishu Sano’s Biography
| Field | Details |
|---|---|
| Full Name | Kaishu Sano (佐野 海舟) |
| Date of Birth | December 30, 2000 |
| Age | 25 |
| Place of Birth | Tsuyama, Okayama, Japan |
| Nationality | Japanese |
| Height | 1.76 m (5 ft 9 in) |
| Position | Defensive Midfielder |
| Current Club | 1. FSV Mainz 05 (Bundesliga) |
| Jersey Number | 6 |
| Preferred Foot | Right |
| Turned Professional | 2019 |
| Net Worth | ~$3 million (estimated) |
| Annual Salary | ~€1.5–2 million (estimated) |
| Player Agent | UDN SPORTS |
| Contract Expires | June 30, 2028 |
Early Life and Career
Kaishu Sano grew up in Tsuyama City, nestled in the mountains of northern Okayama Prefecture — a castle town of roughly 90,000 people with no J.League club of its own.
From the age of three, Sano was a member of FC Viparte, a local club coached by his father Takumi. He followed his father to training sessions from a young age and never stopped touching a ball.
His youth career ran from 2007 to 2015 with FC Viparte, before he moved to Yonago Kita High School from 2016 to 2018.
It was a modest foundation — no elite academy, no big-city spotlight — but Sano’s relentless work ethic began shaping him into the defensive midfielder he is today.
After high school, Sano signed his first professional contract with FC Machida Zelvia in the J2 League in 2019. He spent four seasons there, developing his game in the second tier of Japanese football.
The grind of lower-league football gave him the physicality and reading of the game that would later make him one of the most sought-after midfielders in Europe.
His performances at Machida eventually caught the eye of one of Japan’s most storied clubs.
Professional Career
After four seasons with J2 League club Machida Zelvia, in December 2022 it was announced that Sano would join J1 League club Kashima Antlers for the 2023 season.
He appeared as a starter at the beginning of the season, featuring in nine of their first ten games. In April, he picked up a knee injury which sidelined him for four weeks.
Despite that setback, Sano’s overall output at Kashima was impressive enough to earn him a call-up to the Japan national team.
His impressive performances led to him being capped by Japan under head coach Hajime Moriyasu.
Since his debut for the “Samurai Blues” at the end of 2023, Sano made four appearances before his move to Europe.
On July 3, 2024, Sano signed for Bundesliga club Mainz 05 on a four-year contract, becoming the club’s third Japanese Bundesliga player after Shinji Okazaki and Yoshinori Muto. His adaptation to German football was near-instant.
In the 2025/2026 Bundesliga season, Kaishu Sano recorded 1 goal, 2 assists, and 3,059 minutes of football, earning an average FotMob rating of 7.3. His ability to cover ground earned him the nickname “Dynamo” among Bundesliga fans.
Sano earned his place in Japan’s FIFA World Cup 2026 squad alongside luminaries such as Wataru Endo (Liverpool), Takefusa Kubo (Real Sociedad), Ritsu Doan (Eintracht Frankfurt), and Daichi Kamada (Crystal Palace).
Kaishu Sano’s Net Worth Details
As of 2026, Kaishu Sano’s has an estimated net worth of approximately $3 million.
He built this wealth primarily through his professional football contracts in Japan and Germany. His move to the Bundesliga in 2024 marked the turning point in his earnings, shifting him from J.League wages to a top-five European league salary.
Contract
Sano signed a four-year contract with Mainz 05 running until June 2028 when he joined from Kashima Antlers in July 2024.
The transfer fee Mainz paid Kashima was reported at €2.5 million — a modest outlay that has already proven to be outstanding value.
According to Sport Bild, Mainz sporting director Christian Heidel is now targeting a sale of up to €60 million for Sano — a figure that would smash the club’s current transfer record, previously set when Brajan Gruda was sold to Brighton & Hove Albion for €31.5 million.
The report describes Sano as one of the most sought-after defensive midfielders in Europe.
Per Kaishu Sano’s Transfermarkt profile, his current market value sits around €24.5–29 million, a figure that has risen dramatically since his Bundesliga debut.
Salary
Kaishu Sano’s exact salary at Mainz 05 has not been officially disclosed. Based on publicly available wage data and Bundesliga benchmarks for players of his profile and market value, his annual earnings are estimated at approximately €1.5–2 million per year (roughly $1.6–2.2 million USD).
This is a significant step up from his J1 League wages at Kashima Antlers, where top players typically earn in the range of €300,000–600,000 annually.
His Bundesliga salary reflects both his defensive importance to Mainz and his growing international reputation.
Sano ranks among the Bundesliga’s top players for distance covered per game, a physical attribute that increases his value to any coaching staff.
Career Earnings By Year
| Season | Club | League | Estimated Annual Earnings |
|---|---|---|---|
| 2019 | FC Machida Zelvia | J2 League | ~€50,000 |
| 2020 | FC Machida Zelvia | J2 League | ~€60,000 |
| 2021 | FC Machida Zelvia | J2 League | ~€80,000 |
| 2022 | FC Machida Zelvia | J2 League | ~€100,000 |
| 2023 | Kashima Antlers | J1 League | ~€350,000 |
| 2024 | Kashima Antlers / Mainz 05 | J1 / Bundesliga | ~€700,000 |
| 2025 | Mainz 05 | Bundesliga | ~€1,500,000 |
| 2025/26 | Mainz 05 | Bundesliga | ~€1,800,000 |
Career Statistics
| Season | Club | Competition | Apps | Goals | Assists |
|---|---|---|---|---|---|
| 2019–2022 | FC Machida Zelvia | J2 League | ~100 (approx.) | — | — |
| 2023 | Kashima Antlers | J1 League | 27 | 1 | 0 |
| 2024 | Kashima Antlers | J1 League | 20 | 0 | 2 |
| 2024/25 | Mainz 05 | Bundesliga | 34 | 0 | 0 |
| 2025/26 | Mainz 05 | Bundesliga | 28 | 1 | 1 |
| International | Japan | All comps | 17 | 0 | 0 |
FAQs
What is Kaishu Sano’s net worth?
Kaishu Sano’s net worth is estimated at approximately $3 million. He built this through professional contracts in Japan’s J-League and his current deal with Bundesliga club Mainz 05.
How much does Kaishu Sano earn at Mainz 05?
His exact salary is undisclosed, but based on Bundesliga wage benchmarks for his profile and market value, he earns an estimated €1.5–2 million per year at Mainz 05.
What is Kaishu Sano’s transfer value?
His current transfer value is listed at approximately €29.2 million, though reports suggest Mainz could target up to €60 million in a potential sale.
Is Kaishu Sano in Japan’s World Cup 2026 squad?
Yes, Kaishu Sano is part of Japan’s FIFA World Cup 2026 squad as a midfielder, representing the Samurai Blue alongside Wataru Endo, Takefusa Kubo, and Daichi Kamada.
Who is Kaishu Sano’s brother?
Kaishu Sano is the elder brother of Kodai Sano, who plays for NEC Nijmegen in the Netherlands. Both brothers play professional football in Europe simultaneously.
