Contents
The Couple

KakaShizu (Japanese カカシズ KakaShizu) is the term used to refer to the romantic relationship between Kakashi Hatake and Shizune...
Their Relationship
Part II

Kakashi and Shizune during the War Arc.
Five Kage Summit
Shizune can be seen together with Kakashi, Naruto, and Sakura, looking down at a comatose Tsunade.
Fourth Shinobi World War: Countdown
When Shizune tells Tsunade that the barracks have run of food, Tsunade's gaze seems to linger on their pet pig, Tonton. Shizune is shocked by the implication, but she looks back and is greatly relieved to learn that Kakashi was behind her and Tsunade was simply staring at him.
Blank Period
Shizune acting as Kakashi's assistant.
Kakashi Hiden: Lightning in the Icy Sky
After Tsunade steps down as Hokage and Kakashi succeeds the position, Shizune continues to work as the Hokage's assistant.
Konoha Hiden: The Perfect Day for a Wedding
Shizune is often by Kakashi's side as his assistant, helping him with his duties or getting onto him to do his job in the same way she had with Tsunade. They review the everyone's presents for Naruto and Hinata's wedding together. Both of them are shocked to see Guy's and Lee's eccentric choices of presents.
Evidence
None
Quotes
Episode 496
- Shizune: "Kakashi-sama, I've brought you some tea."
- Kakashi: "Can you drop the 'sama' part?"
Episode 496
- Shizune: "Kakashi-sama!"
- Kakashi: “How many times do I have to tell you to stop it with the ‘sama’ part already.”
Among the Fans
KakaShizu is a relatively rare pairing in the Naruto Fandom. Fans support it due to Shizune's respect for Kakashi and her role as Kakashi's adviser when he was Hokage.
It's a rival pairing towards KakaRin.