| Name | Club | E1 | Pld | New | +/- |
|---|---|---|---|---|---|
| Krzysztof Jakubiak | Cardiff | 1065 | 5 | 1069 | +4 |
| Dai James | Pontypridd | 1887 | 11 | 1864 | -23 |
| Jonathan James | Nelson | 2030 | 0 | 2030 | 0 |
| Wayne James | Bridgend | 1489 | 10 | 1492 | +3 |
| Mark Janas | Cardiff | 1886 | 3 | 1854 | -32 |
| Roger Jenkins | Pontypridd | 1576 | 23 | 1577 | +1 |
| Daniel Jeremy | St John's College | 850 | 3 | 828 | -22 |
| David Jiles | Penarth | 2023 | 0 | 2023 | 0 |
| Richard Jiles | Penarth | 889 | 0 | 889 | 0 |
| Alan John | Bridgend | 850 | 0 | 850 | 0 |
| Michael John | Bridgend | 1198 | 0 | 1198 | 0 |
| Derek Jones | Cardiff | 2003 | 13 | 1989 | -14 |
| Dwain Jones | Caerphilly | 1001 | 8 | 1004 | +3 |
| Gruff Jones | Cardiff | 1621 | 1 | 1613 | -8 |
| Jeremy Jones | Nelson | 1698 | 26 | 1710 | +12 |
| Mark Jones | Bridgend | 1683 | 10 | 1685 | +2 |
| Martin Jones | Caerphilly | 1622 | 2 | 1603 | -19 |
| Mike Jones | Pontypridd | 1627 | 0 | 1627 | 0 |
| Phil Jones | Barry | 1359 | 15 | 1306 | -53 |
| Rejul Joseph | St John's College | 850 | 3 | 815 | -35 |
| Mike Joslin | Caerphilly | 1384 | 7 | 1379 | -5 |
| Allen Jossy | Cardiff | 853 | 0 | 853 | 0 |
| Sam Jukes | Barry | 1424 | 20 | 1360 | -64 |
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