It is reported that Manchester United are among a group of four major clubs interested in Mainz's Japanese midfielder Kaishu Sano, following his impressive performances for Japan at the World Cup. The group also includes Liverpool, Arsenal, and Borussia Dortmund. Liverpool are showing strong interest in the 25-year-old. Sano has two years left on his contract. Reports from Germany in March suggested Mainz would only sell the player for a bid worth between €50-60 million. Sano joined Mainz in July 2024, and in the 2025/2026 Bundesliga season he made 34 appearances, scoring 1 goal and providing 3 assists. He has 16 caps and 1 goal for Japan, and his current Transfermarkt market value is €40.00m.