If you've taken a gander at the "groups", you'll see that there are permits, like the Entrepreneur permit and the contractor/builder permit. So, what are these?

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Entrepreneur permit:

This allows you to open your own shops and such. To get one, all you have to do is ask. There's a catch though, you have to have at least 100 ¥en, and you have to be a member for at least 2 days. Inactive shops will be shut down, and you are only allowed to have 5 shops.

Contractor/Builders permit:

This permit allows you to open a school, apartment/housing complex, etc. Same rules as the Entrepreneur permit.

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