( oh ha Yoko at Dumas ) means. Good morning from dawn to greet them. Until 10 o'clock, but no later than 11 o'clock. Use a fresh, clear voice that if a close friend or someone who just say おはよう( oh ha yo ) was .
means morning greeting used from dawn until 10 a.m. but not more than 11 a.m. should use sound fresh. Clearly, if a friend or someone close, say just お は よ う (ohayou).