Postage to Japan from the UK
How much it costs to send a letter, large letter or small parcel to Japan, how long it takes and what you need to know about customs.
Letter£3.60
Large letterfrom £4.60
Small parcelfrom £15.25
Typical delivery5-7 days
Once items reach Japan, delivery is fast and reliable. The longest part of the journey is usually the international flight and customs. Allow 5-7 working days for letters.
| Size | Weight | Price |
|---|---|---|
| Letter | Up to 100g | £3.60 |
| Large Letter | Up to 100g | £4.60 |
| Large Letter | 100g-250g | £8.15 |
| Large Letter | 250g-500g | £11.45 |
| Large Letter | 500g-750g | £19.60 |
| Small Parcel | Up to 250g | £15.25 |
| Small Parcel | 250g-500g | £22.20 |
| Small Parcel | 500g-750g | £26.10 |
| Small Parcel | 750g-1kg | £30.15 |
| Small Parcel | 1kg-1.25kg | £33.65 |
| Small Parcel | 1.25kg-1.5kg | £36.20 approx. |
| Small Parcel | 1.5kg-2kg | £40.75 approx. |
Prices from 5 October 2026, last checked 1 October 2026. Prices marked approx. are our best estimate – confirm with the carrier before paying.
How to address post to Japan
Japanese addresses can be written in English from largest to smallest area or the reverse - always include the 7-digit postcode (e.g. 100-0001) and JAPAN on the last line.
Things to know about posting to Japan
- Japan Post delivers Royal Mail items and is very reliable.
- Japan restricts some medicines, including some common cold remedies.
- Food items may need to be declared.
General tips
- Put JAPAN in capitals as the last line of the address.
- For goods, fill in the customs declaration with an accurate description, value and quantity.
- International Standard is not tracked. If the item is valuable, choose a tracked service or a courier.
- Heavier parcels (over 2kg) need a courier or Royal Mail's International Tracked or Parcelforce services.
Frequently asked questions
How much does it cost to send a letter to Japan?
A standard letter up to 100g costs £3.60 with Royal Mail International Standard.
How much is it to post a small parcel to Japan?
A small parcel starts at £15.25 for up to 250g, rising to £30.15 for 1kg with Royal Mail International Standard.
How long does post to Japan take?
Royal Mail aims to deliver International Standard post to Japan in around 5-7 working days, but it is not guaranteed.
Do I need a customs form to send a parcel to Japan?
Yes, if you are sending goods or gifts. You can complete the customs declaration online when you buy postage, or at the Post Office counter. Documents and letters do not need one.