Here is a summary of the UK to Japan airmail postage rates for small packages
(from information on the Royal Mail web site).
| 100g | £1.46 | ¥333 | 1100g | £11.03 | ¥2515 | |
| 200g | £2.48 | ¥565 | 1200g | £11.98 | ¥2731 | |
| 300g | £3.43 | ¥782 | 1300g | £12.93 | ¥2948 | |
| 400g | £4.38 | ¥999 | 1400g | £13.88 | ¥3165 | |
| 500g | £5.33 | ¥1215 | 1500g | £14.83 | ¥3381 | |
| 600g | £6.28 | ¥1432 | 1600g | £15.78 | ¥3598 | |
| 700g | £7.23 | ¥1648 | 1700g | £16.73 | ¥3814 | |
| 800g | £8.18 | ¥1865 | 1800g | £17.68 | ¥4031 | |
| 900g | £9.13 | ¥2082 | 1900g | £18.63 | ¥4248 | |
| 1000g | £10.08 | ¥2298 | 2000g | £19.59 | ¥4467 |
Notes:
- Valid December 2006
- Calculated at £1 = ¥228.
- The actual charges are in 20g increments, but I didn't want to list them all.
- The surface rates are almost exactly 50% of the Airmail rates, but they are in 50g increments.
- 2000g is the maximum weight that can be sent by this "Small Packet" service.