Formal is more polite and also if you don't know the person.
Greeting are important for every language; they decide the tone of the conversation that follows.
The first way to say good morning is is a common suffix in Japanese used to indicate a high degree of politeness and respect.
Since this form is more polite, you’ll often hear it in Japan in places such as schools, stores, workplaces, etc.
The Japanese language uses different greetings depending on the time of day (as English does) and the situation (such as whether the person you’re greeting is a close friend or a superior at work).
Let’s take a look at the most common Japanese phrases and how to use them.
If you’re studying Japanese, you’ve likely heard that formality is a big deal in Japanese culture.
This is generally true—and it can make using the Japanese language pretty darn confusing.
sounds very similar to the US state Ohio (oh-high-yoh).
The only big difference is that you enunciate the "y" sound a little more strongly and hold the final "o" sound out longer (that’s why there’s a line above the letter).