Danzō selects Fū and Torune to escort him to the Kage Summit in the Land of Iron. Once they arrive and the meeting begins, Fū comes to Danzō's defence during the Fourth Raikage's outburst and Zetsu's appearance. Zetsu informs them of Sasuke Uchiha's presence, and Fū and Torune try to go and eliminate them. The Raikage goes instead, so they stay with Danzō. Fū alerts Danzō when Sasuke's sensor locates them and subsequently flees with Danzō when Sasuke arrives at their location. They are pursued by Ao. At some point, Zetsu's Spore Technique activates, but they manage to free themselves from the Zetsu clones.
Fū sets a trap for Ao.
Danzō instructs Fū to stop Ao and safely retrieve his Byakugan. Fū lays several traps, including the Mind Puppet Switch Cursed Seal Technique, and once it activates he gains control of Ao's body. However, seals are activated, protecting the eye. After trying to remove the tags with a kunai, Fū senses the Fifth Mizukage and Chōjūrō coming and proceeds to bind Ao's hands and tie a kama to a tree branch, telling Ao that he is going to decapitate him so that he can take his head. He then jumps down towards the kama, but the Mizukage arrives in time to catch him. Acting as Ao, Fū explains that his body was being controlled, apologises to her and Chōjūrō for worrying them and asks her to untie his hands. The Mizukage prepares to do so, while also offering to remove the seal from the Byakugan, to which Fū agrees, planning to crush Ao's eye. However, the Mizukage leaves his hands bound and asks Chōjūrō to lend her the Hiramekarei, explaining that the real Ao would have never apologised to them in such a manner, and that he also knew very well that she wasn't able to remove the seal over his eye. Fū then insults the Mizukage for seeing through his deception before leaving Ao's body.
Fū and Torune fighting Tobi.
aring Konoha, Fū, Torune, and Danzō are ambushed by Tobi. While Danzō prepares for battle he has Fū and Torune distract Tobi. Fū tries to use the Mind Body Switch Technique, but Tobi teleports away before it can connect. Tobi stages a counter-attack and Fū slashes at him with his sword, but Tobi catches the blade. Torune throws a kunai at Tobi, forcing him to release Fū. Fū and Torune try attacking from different angles, hoping that one of them will be able to attack Tobi while Tobi is attacking the other. Tobi sees through their plan but plays along, causing Torune to accidentally infect Fū with his nano-sized, venomous insects. Torune cures him, but Tobi quickly kicks them and knocks them uncontious.