Obito can use kamui without sharingan

[-ahhimane-]

WTF?
You're completely wrong.

Susano'o is the third power which awakens after the two MS powers awakened.
Susano'o doesn't need MS
But the two base powers needs MS
Kamui is a base power and hence MS is a must.

 

[End of Days]

Shitty translation

MS ability is MS ability

 

[Frikid]

WTF?
You're completely wrong.

Susano'o is the third power which awakens after the two MS powers awakened.
Susano'o doesn't need MS
But the two base powers needs MS
Kamui is a base power and hence MS is a must.

yet obito used it without unlocking ms and used it with his eyes closed.

He used in unconsciously but he still did use it so yeah, it can be used without sharingan.