This study is based on a review of the Japanese logic structure shown in the Japanese language and has the characteristics as the basic data for future research. When we say that logic refers to the form and law of THOUGHT, we need to look at the logic structure of the Japanese in terms of individual words, polite expressions, related to human relations, such as words, vocabulary, and words that are often used in everyday life, such as greeting and calling. Other words such as “Receive” and “Passive” and “Causative” are believed to have a unique Japanese logic. I think this series of research results will help us understand the Japanese way of doing things in terms of mutual cultural understanding.