Teacher’s Day is not an official national holiday in Japan. There are a few potential reasons for this:

1. Cultural emphasis on respect for teachers: In Japanese culture, there is already a strong tradition of respecting and honoring teachers throughout the year, rather than designating a single day for this purpose. Students are expected to show respect to their teachers on a daily basis.
2. Existing celebrations: Japan has other events and traditions that recognize the importance of teachers and education, such as the Entrance Ceremony (Nyūgaku Shiki) at the start of the school year, and the Graduation Ceremony (Sotsugyō Shiki) at the end of the school year.
3. Focus on different holidays: Japan has its own unique set of national holidays, many of which are deeply rooted in Japanese culture, history, and traditions. These holidays take precedence over more modern or international observances like Teacher’s Day.
4. Potential overlap with existing holidays: Some have suggested that the Japanese holiday Bunka no Hi (Culture Day) on November 3rd serves a similar purpose in honoring academics, educators, and cultural achievements.

While Teacher’s Day is widely celebrated in many countries, Japan has chosen to honor and appreciate its teachers through other cultural traditions and existing school events rather than designating a specific national holiday for this purpose.