- Internet service provider
- Immigration & naturalization service
- Interior fitting contractor
- Indoor golf course
- Indoor playground
- Ice skating rink
- Interior plant service
- Information bureau
- Investment service
- Insurance broker
- Immigration attorney
- Insulation contractor
- Investment company
- Insurance attorney
- Isuzu dealer
- Invitation printing service
- Industrial real estate agency
- Industrial design company
- Insolvency service
- Interior Decorator