April is a start of a new school year in most of Japanese schools. Most of the junior high schools and high schools, public and private, have uniforms for students. They cost around 20000 yen in my experience. Typically from January to March of a year, parents buy new uniforms, shoes and bags for their children.
This is a picture of a train station. I think time goes by like this. A passenger can only see a small area of a long route. You can change something, not everything.
Photo is taken by my android phone.