You mean the word itself? You hold the O sound as indicated by the U (in English it creates a whole new sound but in Japanese its a long vowel sound) but this literally like 'o o' not 'oo' in 'look' because that becomes the Japanese U sound, try to say it like two separate words, pronouncing the o twice. Then the I is pronounced like the I in 'hit' and the JA is pronounced like 'jacket' or 'jail'.
So like this O oija
to
Kurikku
how do you pronounce it
tsuki
chiizu
maikaru
kore
kaze
Steevann
Nabigeetaa.
saigo
yoru