There were some unique characteristics of Japan that I personally could not understand. They were the use of cash and the existence of public telephones. I thought that cards were easier than cash and smartphones were easier than public telephones. At that time, I had never been to Japan, so I had always understood Japan from a Korean perspective. Then, after going to Japan for language training in January 2024, I realized that Korea is not a country where earthquakes occur frequently like Japan, so there are hardly any public telephones on the street and card use is active. Since I majored in Japanese studies, I thought I had a good grasp of Japanese culture and characteristics. However, even though I literally knew the culture and characteristics well, I felt that I did not make an effort to understand why it was like that. So I would like to understand Japan in three dimensions by studying abroad in Japan for a year. Furthermore, I would like to contribute to the development of Korea-Japan relations based on what I have seen and learned directly as a Japanese studies student.