Japanese attach importance to the daily ambiguous expression and think it is the best way to talk. This paper discusses the fuzziness of Japanese. The research method is as follows: firstly, it expounds the meaning of ambiguity and its characteristics in language communication. Secondly, it will focus on the performance of ambiguity in different environments. Then it discusses the reason why Japan has formed a special fuzzy cultural phenomenon. Finally, the influence of Japanese fuzziness will be discussed. The fuzziness of Japanese is reflected in various aspects, and the language and culture displayed are an important feature different from other cultures. By exploring the ambiguity of Japanese communication, we can learn more about Japanese and communicate better in life, which will help us to understand Japanese culture more deeply, promote cultural exchange and prosperity between the two countries, and reduce cultural friction.