There are many kinds of golf schools in Tokyo.
Mainly 3 kinds of schools. Usually, schools provide Inside lesson, Outside lesson, and Course lesson.
You might be thought it is hard to choose suitable one for you.
No worry, actually you can choose school by your level and needs.
For inside lesson, you can play anytime without worry about climate and time.
Place is mostly at convenient place close to station.
For outside lesson, you can play under sunshine and practically play and see how the ball goes by hit.
For course lesson, you can actually learn by playing course with coach.
Generally, beginner start learning by either inside or outside lesson.
Group lesson is ok, but if you want to learn precisely, I recommend private lesson.