- Janitorial and custodial services
- Jet Ski Rental
- Jewellery Parts Replacement
- Jewellery Repair
- Jewelry Making
- Jewelry and watches in department stores
- Jewelry and Watches Stores
- Jigging
- Job Placement and Retention Services
- Job placement services for the elderly
- Job Training and Assistance Programs
- Journal Publishing
- Judicial Writing & Research
- Jury Verdict Research & Consulting Services