MSJ
MSJ stands for:
- Magnetics Society of Japan , a specialist physics society
- Mathematical Society of Japan, the Japanese Mathematical Society
- Microsoft Systems Journal, a trade journal from Microsoft
- Mid-Size Jet, a model range from the Brazilian aircraft manufacturer Embraer
- M issionarii S ancti I oannis, missionaries of St. John the Baptist a Catholic male order
- Misawa Air Base , IATA code for the US Air Force base in Japan
- Monthly Shōnen Jump , a Japanese manga magazine
- Multiple Sclerosis Journal , a medical journal