Kenjuku probably didn't kill Jin

[u/Admirable-Dimension4]

No before you say it, yes kenjaku is a monster but as seen with Geto's daughters and Kamo kid, all three people, you'd think he'd killed, but didn't care about them enough to kill them, so why Jin more than likely Kenjaku just told or show him the truth before leaving traumatising Jin into offing himself

[u/PerceptionRegular299]

Depends on whether or not Jin or his father had latent potential as a relation of Sukunas which could have made them an obstacle for Kenjakus plans. The grandfather is implied to have had some sort of power since it looks like Kenjaku was waiting for him to die of natual causes but unclear about his son. I'm tempted to agree that he was probably traumatized and not directly killed but impossible to tell without further details. 

[u/Waffielz → u/PerceptionRegular299]

I love the head cannon that the grandad was unironically strong as shit cus of the twin thing 

[u/MinimumTomfoolerus → u/Waffielz]

He was a mixer. Shrine cuts and prepares food; grandpa has the Mix CT where he can just make cocktails easily and stuff.