How easy/difficult it is to get approval on sanitary / food safety here in Japan?

I recently attended handmade fes and I came across home-based businesses selling food decors (eg cookie cutters) and food itself (homebaked cookies, cake etc.)

One seller in the fair was explaining to the customers that they submitted their cookie cutters for approval.

I became curious on how these small businesses got approved on food safety / sanitary here in Japan. I believe people in this sub have businesses so I would appreciate it if you can share your personal experiences.