深夜勤務手当 – Japan Shift Allowance Calculator
Japan Shift Pay Overview
Local terminology: 深夜勤務手当 (shinya kinmu teate – late-night work allowance) or 交代勤務手当 (kōtai kinmu teate – shift work allowance)
Under the Labor Standards Act, employers must pay a 25% premium for late-night work (10 PM–5 AM). This is one of the few legally mandated shift premiums globally. Shift work allowances (交代勤務手当) for rotating patterns are set by company rules or collective agreements.
Japan Shift Types & Typical Premiums
| Shift Type | Hours | Typical Premium | Common Industries |
|---|---|---|---|
| Late night (深夜) | 10 PM–5 AM | 25% (legally required) | All industries |
| Early morning | 5 AM–7 AM | 0–10% (voluntary) | Manufacturing, Logistics |
| Rotating shift (交代勤務) | Weekly/monthly rotation | ¥500–¥3,000/shift | Manufacturing, Healthcare |
| Holiday work (休日) | Statutory holidays | 35% premium | Legally required |
| Late-night + OT (combined) | 10 PM–5 AM during OT | 50% (25% + 25%) | Stacked premiums |
Shift Pay Examples at 25% Differential
Based on common Japan hourly rates with a 25% shift premium.
| Base Rate | Differential | Adjusted Rate |
|---|---|---|
| ¥1,000 | 25% | ¥1250.00 |
| ¥1,200 | 25% | ¥1500.00 |
| ¥1,400 | 25% | ¥1750.00 |
| ¥1,700 | 25% | ¥2125.00 |
| ¥2,000 | 25% | ¥2500.00 |
| ¥2,500 | 25% | ¥3125.00 |
Industry Breakdown – Japan
Manufacturing (Monozukuri): Japanese factory workers on 2-shift or 3-shift patterns receive 交代勤務手当 of ¥1,000–¥3,000 per shift plus the statutory 25% night premium.
Healthcare: Hospital night duty (当直) in Japan attracts the 25% legal premium plus facility-specific night duty allowances ranging from ¥3,000–¥20,000 per night.
Convenience Stores (Konbini): Late-night staff at convenience stores automatically receive the 25% premium for 10 PM–5 AM hours.
Frequently Asked Questions
Yes. Under the Labor Standards Act, a 25% premium is legally required for all work between 10 PM and 5 AM. This applies to all employees regardless of industry.
交代勤務手当 (kōtai kinmu teate) is a shift work allowance paid to employees on rotating shift patterns. The amount is set by company policy, typically ¥500–¥3,000 per shift.
Yes. If you work overtime during late-night hours (10 PM–5 AM), you receive both the 25% overtime premium and the 25% night premium, totaling a 50% increase.