Shift and injury type definitions

This topic includes workers' compensation definitions for shifts and for injury types for the United States and Japan.

U.S. shift definitions

Shift Time
Day 9:00 a.m. to 4:59 p.m.
Night 7:00 p.m. to 6:59 a.m.
Evening / Commute 7:00 a.m. to 8:59 a.m. and 5:00 p.m. to 6:59 p.m.

Japan shift definitions

Shift Time
Morning (Day) 6:00 a.m. to 5:59 p.m.
Night 6:00 p.m. to 5:59 a.m.

Injury type definitions

U.S. Severity Level Japan Severity Level Description
Minor Outpatient Injuries requiring basic medical aid without requiring hospitalization.
Moderate Hospitalization and Surgery Injuries requiring a greater degree of medical care and hospitalization, but not expected to progress to a life threatening status.
Major Disability Injuries that pose an immediate life-threatening condition if not treated adequately or expeditiously. The majority of these injuries are the result of structural collapse and subsequent entrapment or impairment of the occupants.
Fatal Death Instantaneously killed or mortally injured.