Shortened form of "Ohayou gozaimasu," the Japanese salutation equivalent
to "Good morning." It is a cute way of saying hello.
"Oha" was made
popular by a Japanese celebrity, Shingo Katori, on the TV show "Saturday SMAP." He uses it as his catchphrase, and used
it in his song "Shingo Mama
no Oha Rock."
A hand gesture usually accompanies an "Oha!" greeting. On the first syllable
"oh", hold up your hands, palms
your index fingers touching
your thumbs (like the American "O.K." gesture). On the second syllable
"ha," straighten out your index fingers and thumbs, and push your hands forward.