- Haken – Temporary contract service, based on hourly wage, where instructions are mainly provided by the company, with the assistance of translators or interpreters, if necessary.
- Ukeoi – Outsourcing service based on hourly wage, where work instructions are usually provided by the outsourcing company.
- Keiyaku – Fixed-term contract service, usually established based on monthly salary.
- Shain – Service of permanent contract, without a fixed-term contract, usually based on a monthly salary.