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Hans's difficulties most likely stem from cultural differences in emotional expression and/or body language between these countries (Japan and Germany). It depends on cultural designs.
Culture can be defined as the arts and beliefs of a human population that are passed across generations.
Culture may be very different in distinct aspects for different countries, sometimes raising situations of concern.
Moreover, body language refers to the use of physical behavior and expressions to communicate ideas in a nonverbal manner.
Learn more about culture here:
https://brainly.com/question/25010777