According to Bild, Mainz 05 is setting an internal deadline for the potential transfer of Japanese player Kaishu Sano, meaning the bidding window for interested clubs will close earlier than for other Bundesliga teams.

This means clubs with strong financial backing that are hoping to sign Kaishu Sano have little time left to make their move. A transfer can only happen if an offer attractive enough to convince Mainz Sporting Director Christian Heidel is made before the deadline.

The 25-year-old Kaishu Sano became a key player in Mainz's midfield last season, starting all 34 Bundesliga matches and contributing 1 goal and 2 assists. Across all competitions, he made 48 appearances, scoring 2 goals and providing 3 assists, and was included in Japan's squad for the 2026 World Cup in the US, Canada, and Mexico. Thanks to his consistent performances, his market value has continued to rise, currently reaching 40 million euros according to Transfermarkt, making him Mainz's most valuable player.

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