- jacket
- Japanese studies
- jassen (Swiss card game)
- javelin
- jazz (genre)
- jewelry (craft work)
- jewelry (fashion) / piece of jewelry
- job market
- job printing
- job search
- job-seeking
- joinability (product feature)
- joined-up writing
- joining technology / joining (manufacture)
- joke
- joke article
- journalism
- journalism / media studies
- Journalist / Editor (profession)
- Judaism
- judo
- jug (food storage)
- Jugendstil
- juggling
- jumping
- junk culture
- jurisprudence / law
- justice