Does this describe Japanese people in general ? or how would you put it better?

Question:

USA: I love you, I love you I love you, but I do not know you tomorrow.
Japan: No words, but love is shown by the act no matter what.

USA: Individual is important than others. Secure own first then help others
Japan: Group is more important than individuals. Sacrifice themselves to help others.

Answer:

USA: Outspoken & opportunistic.
Japan: Bottled-up emotions to preserve peace & harmony (わ).