Depending on your age, you might look in to a working holiday visa. (though these are currently not issues due to covid limitations)

Otherwise you need to get a certificate of eligibility via the company that is going to hire you. Which is currently issued. But you'd need to find the company before you can start the process.

I don't know a great amount of details on either, but if you Google on the two terms and Japan I am sure you can find a lot of information.