It doesn't mean anything in Japanese. I know because Omi is my name, and I've thoroughly looked into it ;)
it means: samoan/mexican((:
ALL or EVERY
In Korean, "omi" (엄이) means aunt on your mother's side. It is the term used to address and refer to your mother's sister.
Omayra Omi Torres goes by Omi.
Toshinori Omi is 177 cm.
Omi Vaidya is 164 cm.
Koji Omi was born in 1932.
Omayra Omi Torres is 5' 5".
Yusuke Omi was born on 1946-12-26.
Omi Vaidya was born on 1982-01-10.
Yukitaka Omi was born on 1952-12-15.
Omi Sato was born on 1975-12-22.