Liverpool's Summer Transfer Dilemma: The Kaishu Sano Situation
Liverpool’s quiet summer is starting to sound loud.
With just over a month left in the window, Victor Muñoz remains Liverpool’s only signing, a solitary arrival in what was billed as a sweeping rebuild under new head coach Andoni Iraola. Arne Slot has gone, the dugout has changed, but the squad around it looks eerily familiar – and, some would argue, a touch weaker than it did at the end of the 2025-26 season.
Supporters were primed for a churn of five or six fresh faces. Instead, they’ve had weeks of rumour and little concrete movement. Names come and go in the gossip cycle, but a handful keep resurfacing, fed by near-daily updates and the sense that Liverpool are waiting to pounce rather than shaping the market themselves.
One of those names is Kaishu Sano.
Midfield in flux, money on the table
Midfield was supposed to be the one area Liverpool didn’t have to panic about. In pure numbers, it remains their deepest department. Yet the picture is far from settled.
Curtis Jones, Harvey Elliott and Trey Nyoni have all been linked with moves away this summer. Lose even one of them and Liverpool’s balance shifts. Lose two and a position of strength starts to look like a problem. Any departure will demand a replacement, and the recruitment team know it.
Targets have followed predictably. The club’s willingness to spend has been underlined by reported talks with Paris Saint-Germain over Bradley Barcola, a deal that would not come cheap. The money is there. The question is where they choose to drop it.
Which brings the focus sharply onto Mainz and their Japan international anchorman.
Mainz send a clear message on Sano
Kaishu Sano has become one of the more intriguing options on Liverpool’s list, but Mainz are in no mood to be bullied into a sale.
Sporting director Christian Heidel made that abundantly clear when speaking to Bild. He refused to be drawn on specific clubs, but his stance on Sano’s future left little room for misinterpretation.
"I won't comment on any rumours or any of the clubs mentioned. We don't have to sell Kaishū; we can afford to keep him," Heidel said. "If he stays, there will be many happy people in the team, the club, and everywhere around it. But it's like always at Mainz 05. Should an offer come in that takes our breath away, we'll have to consider it!"
That “takes our breath away” line is the key. Mainz know Sano’s value in a bloated market and are acting like a club under no financial duress. The message to Liverpool is simple: if you want him, pay up.
The figure being discussed is around £50 million. In the current climate, for a 25-year-old defensive midfielder with Bundesliga pedigree, that looks less like a ransom and more like the going rate.
From relative unknown to serious option
Outside Japan and the Bundesliga, Sano’s name only really pierced the wider consciousness at the 2026 World Cup. He is not a headline star, not yet, but his body of work in Germany has been quietly impressive.
Since arriving in the Bundesliga for the 2024-25 season, Sano has played 84 times for Mainz in all competitions. Eighty of those appearances have come at the base of midfield, where he screens the back line, breaks up play and keeps the ball moving. He is not a luxury player. He is the platform others stand on.
The attacking return arrived last season: seven goal contributions in the 2025-26 campaign, a sign that his influence is starting to stretch higher up the pitch. For a defensive midfielder, that’s a handy bonus rather than the core of his game.
Liverpool, of course, would be buying more than numbers. They would be buying control, legs, and a player entering his prime years.
A direct challenge in Liverpool’s engine room
Drop Sano into this Liverpool squad and one thing becomes clear: Ryan Gravenberch would suddenly feel a lot less comfortable about his place in the pecking order.
Sano’s presence at the base would allow Iraola to be more aggressive with his advanced midfield roles, but it would also increase the competition for minutes in that central trio. The Japan international offers a more specialist defensive profile, the kind of dedicated shield that frees others to roam.
In pure football terms, £50 million for that kind of profile makes sense. He fits the age bracket, brings top-level experience and offers a defined role. It is the sort of signing that can quietly transform a team’s structure without dominating the back pages.
Yet there is a catch, and it’s a big one.
The homegrown headache
Sano would not solve – and might even deepen – one of Liverpool’s most awkward problems: homegrown quotas.
If Curtis Jones leaves and Sano arrives, the club lose a homegrown midfielder and replace him with a non-homegrown player. That would leave Liverpool needing yet another midfield addition to keep their registration balance in check.
So any move for Sano cannot exist in isolation. It would have to sit inside a broader plan: one that covers outgoing academy products, incoming foreign talent and the Premier League’s homegrown requirements. That is a delicate equation for a club already walking a fine line with squad composition.
For now, the situation is clear. Mainz are holding firm. Liverpool are watching, weighing up a £50 million decision, and still waiting to ignite a window that was supposed to reshape the team.
The question is no longer whether Kaishu Sano is good enough. It’s whether Liverpool are prepared to let this summer drift by without the kind of statement in midfield that their new era seems to demand.
