YJ or yJ may refer to:
The YJ-12 (Chinese: 鹰击-12; pinyin: yingji-12; literally: "eagle strike 12") is a Chinese supersonic anti-ship cruise missile.
The YJ-83 (Chinese: 鹰击-83; pinyin: yingji-83; literally: "eagle strike 83") is a Chinese subsonic anti-ship cruise missile.
The YJ-62 (Chinese: 鹰击-62; pinyin: yingji-62; literally: "eagle strike 62") is a Chinese subsonic anti-ship cruise missile.
The YJ-18 (Chinese: 鹰击-18; pinyin: yingji-18; literally: "eagle strike 18", NATO designation CH-SS-NX-13) is a Chinese family of anti-ship and land attack cruise missiles.
In molecular biology, the YjeF N terminal is a protein domain found in the N-terminal of the protein, EDC3. The YjeF N-terminal domains occur either as single proteins or fusions with other domains and are commonly associated with enzymes.
The yjdF RNA motif is a conserved RNA structure identified using bioinformatics. Most yjdF RNAs are located in bacteria classified within the phylum Firmicutes.
YJ-91 is the Chinese version of the Kh-31. YJ is short for Ying Ji (Yingji, 鹰击) meaning eagle strike. After purchasing 200 Kh-31Ps from Russia, China decided to develop its own version, because the original Kh-31 missile did not fully satisfy Chinese requirements.
Yngwie Johan Malmsteen (/ˈɪŋveɪ ˈmɑːlmstiːn/ ING-vay MAHLM-steen; born Lars Johan Yngve Lannerbäck on 30 June 1963) is a Swedish guitarist and bandleader.
Yeh Jawaani Hai Deewani (English: This Youth is Crazy), is a 2013 Indian romantic drama film, written and directed by Ayan Mukerji and produced by Karan Johar.