Kakashis Mangekyou Sharigan

[Hermits]

When kakashi killed Rin he awakened his Mangekyou Sharigan(so did obito) but why didnt he use it throughout his life in fights?

[kakashichidori]

He didn't want to. ????

[Trollnojutsu]

When kakashi killed Rin he awakened his Mangekyou Sharigan(so did obito) but why didnt he use it throughout his life in fights?

He passes out immediately after getting it, he might not have know he activated it or how to activate it after that. He was still very young with little knowledge of it as well, since it was so rare.

[KidGamer65]

He didn't know he had it until Part 2.

[PureSkillz]

He didn't know he had it until Part 2.

This.

Same thing happened with Sasuke didn't it? He awakened sharingan after Itachi slaughtered the clan
but didn't know.

[Kages]

Because Kishi hadn't thought out the story yet, same reason why Hashirama and Tobirama didn't get their abilities in their fights against Hiruzen

[Okami the butcher]

probably the same reason Sasuke had to reawaken his

[gas83091]

He didn't know he had it until Part 2.

This.

Same thing happened with Sasuke didn't it? He awakened sharingan after Itachi slaughtered the clan
but didn't know.

both correct

[Hermits]

I dont think its a lack of the authors not thinking that far ahead due to the fact that itachi had Mangekyou Sharigan in regular naruto after he killed the Uchia clan this was way before Kakashi had a chance to use his Sharigan against Zabuza

[NamikazeUzumakiNaruto]

First off Kakashi didnt use it because he hadnt activated it, he didnt have enough stamina like the uchihas or naruto. Also Sasuke did not gain the sharingan when his clan was slaughtered, it was when they fought zabuza. He gained mangekyou when he killed itachi, after realizing he wasnt the douchbag he turned out to be.

[swag monkey Enma]

When kakashi killed Rin he awakened his Mangekyou Sharigan(so did obito) but why didnt he use it throughout his life in fights?

You've got to remember the fact that he is Non-Uchiha and can not tolerate the draining effects of MS during combat.

[UchihaInza]

because he probably would be blind bye know if he had