- Japji
- Japji Sahib
- Japonica rice
- japonica rice
- Japura River
- Jarabe
- jarabe
- Jaramogi Ajuma Oginga Odinga
- Jardin Anglo-Chinois
- Jardin Majorelle
- Jargon
- jargon
- jar in shape of a tower
- Jarisch-herxheimer reaction
- jar-lift stow net fishing
- Jarmo
- Jarnail Singh
- Jarnick inequality
- Jarnik
- Jarnsaxa
- jarosite
- Jaroslav Hašek
- Jaroslav Helfert
- Jaroslav Heyrovský
- Jaroslav Seifert