I thing you have your path issue when you run it in local server it it will run smoothly but when you host on live server it will not pick path, thats whay it show page not found 404 etc.
Your efforts to set up Bagisto e-commerce in Japanese are commendable! To make Japanese the default language, you might want to explore AI translation solutions for a smoother transition. These tools can assist in managing language settings seamlessly. Have you considered incorporating AI translation to make Japanese the default language without encountering errors?