Phone Service Question

So I’m moving to Japan September 1st and trying to figure out phone stuff now.

I only plan on being in Japan for a year and I am on my Mom’s phone plan in the states (I give her money for it before anyone says anything), which she plans on keeping me on since I’ll only be gone for a year.

I am wondering how I should go about getting phone service in Japan.

I know a lot of people say to transfer your number to google voice and then get a phone plan in Japan, but wanted opinions on this.

I also know some people do pocket wifi or just a data plan instead of a voice and data plan.

Sorry if this is stupid to ask about, the phone stuff is a little confusing to me. I’ve only ever traveled abroad for short periods, where I just connected to wifi to use my phone and be able to contact family.

Any input would be greatly appreciated!