What could be the reason for Tsunade to retire from being Hokage? [Discussion]

[Trea]

She was in a coma from the Pain Invasion and she was cut in half by Madara. She does not want to give up the illusion of her youth by losing her ability to store chakra, so she is passing the hokage role on to the next generation and retiring. She knows the Hashirama's will of fire has been passed down and will continue to be passed down. She had to be talked into the job by Jiraiya to begin with. She only took the job so Danzo wouldn't get it.

 

[Mikasa Hagaromo]

How can she look herself in the mirror as hokage when she was locked up in IT while her SUBORDINATES saved the world? He's gotta go. Bye Felicia!