| Ref |
country name |
capital |
currencies |
continent |
flag |
| JAM | JAMAICA on to the stamps | Kingston | pound sterling = 20 shillings, Jamaican dollar = 100 cents (from 1969) | America |  |
| JAP | JAPAN on to the stamps | Tokyo | yen = 100 sen | Asia |  |
| YER | JEMEN (REPUBLIKEN) on to the stamps | Sanaa 22 Mai 1990 | Rial yéménite (YER) | Asia |  |
| YAR | JEMEN ARABREPUBLIKEN (YAR) on to the stamps | Sana’a | North Yemini rial = 40 bogaches, North Yemeni rial = 100 fils (from 1978) | Asia |  |
| YES | JEMEN PDR on to the stamps | Aden | South Yemeni dinar = 1000 fils | Asia |  |
| JER | JERSEY on to the stamps | Saint Helier | pound sterling = 20 shillings, pound sterling =100 pence (from 1970) | Europe |  |
| JOR | JORDANIEN on to the stamps | Amman | Jordanian dinar = 1000 fils | Asia |  |
| BRO | JUDISKA AUTONOMA LÄNET BIROBIDZJAN (RYSSLAND) on to the stamps | Birobidzhan | ruble = 100 kopecks | Asia |  |
| YOU | JUGOSLAVIEN on to the stamps | Belgrade | Yugoslav dinar = 100 paras | Europe |  |
| CHR | JULÖN on to the stamps | The settlement | Australian dollar = 100 cents | Asia |  |
| VIR | JUNGFRUÖARNA (Brittiska) on to the stamps | Road Town | US dollar = 100 cents | America |  |