MERN with Japanese language is a good combination for future job

I am currently learning the MERN stack and have decided to learn the Japanese language for a secure future job. However, I find it challenging to manage both at the same time. I am seeking advice on career options that combine these skills. I want to explore career in web development country like japan and I have good communication skill in english. What all career options I have if I learn Japanese language ? Any career options in india itself