Kaishu Sano is a 25-year-old Japanese defensive midfielder at Mainz. Despite having a contract until 2028, few in Mainz expect Sano to stay beyond the summer. Bidding for him from clubs across Europe is expected. Several Premier League clubs have already made inquiries. Sano joined Mainz in July 2024 and has made 27 appearances in the Bundesliga this season, scoring one goal and providing two assists. He has been capped 12 times for Japan. His current Transfermarkt market value is €25.00m.