I've seen a lot of people saying that First Learners should be careful when greeting a Japanese. I have to be careful how to address Japanese people with '-Chan', '-Kun', '-San' and '-Sama' and also how to refer them. I noticed that it would be hard for me to greet a Japanese properly in our first meeting since I don't know her/his name.
Out of curiosity, is it informal to greet Japanese strangers with 'Ohayo', 'Konnichiwa', or 'Konbanwa' only when I go around and see one?
If this question seems inappropriate or stupid, I apologize for my curiosity.
ohayou gozaimasuorkonnichiwawould maybe seem a little strange on a first meeting, but generally I don't think it's a fauxpas. It also depends a lot on the social context. If you happen to be a teenager and are meeting another teenager in school or the like,hajimemashitemay be a bit too formal, so you would probably stick to a more informal form. – Ben Steffan Mar 17 '17 at 17:19