What this guide covers
- The voltage and plug types in Hong Kong
- Whether you need a plug adapter
- Whether you can use electrical products from Japan
This is for traveling from Japan to Hong Kong. The data is the IEC list (as of June 2025). Some places or buildings may use other types, so treat it as a guide.
1. Voltage, frequency and plug types
| Voltage | Frequency | Plug types | |
|---|---|---|---|
| Hong Kong | 220V | 50Hz | D, G |
| Japan (for comparison) | 100V | 50 / 60Hz | A, B |
Source: IEC (International Electrotechnical Commission) World Plugs country list (as of June 2025). The IEC no longer publishes this list, so a copy is kept on this site (retrieved 2026-09-27)
2. Plug adapter
Bring an adapter: Hong Kong uses types D, G (per the IEC list). The list does not include Japan's type A → bring a plug adapter (D, G).
Source: IEC (International Electrotechnical Commission) World Plugs country list (as of June 2025). The IEC no longer publishes this list, so a copy is kept on this site (retrieved 2026-09-27)
3. Electrical products from Japan
| "INPUT" on the product | Result |
|---|---|
| INPUT 100-240V | Voltage: Hong Kong uses 220V. Within the label (100–240V) → no transformer needed |
| INPUT 100V only | Voltage: Hong Kong uses 220V. Outside the label (100V) → do not use it as is. Use a product that supports Hong Kong's voltage, or use a transformer (check the transformer's manual for which products and wattage it supports) |
Check the "INPUT" label on the charger, AC adapter or the product itself. For hair dryers and irons, see Taking a hair dryer or hair iron abroad; for plug shapes, see How to tell plug types A to N apart.
Source: IEC (International Electrotechnical Commission) World Plugs country list (as of June 2025). The IEC no longer publishes this list, so a copy is kept on this site (retrieved 2026-09-27)