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