EWJ may refer to:

• East and West Junction Railway, an early British railway company
• Earthworm Jim (video game)
• iShares MSCI Japan, an exchange-traded fund

• Campylospermum leschenaultii
• Campylospermum malabaricum
• Campylospermum nodosum
• Campylospermum perakense
• Campylospermum plicatum
• Campylospermum retinerve
• Campylospermum rheedii
• Campylospermum serratum
• Campylospermum strictum
• Campylospermum sumatranum
• Campylospermum thwaitesii
• Campylospermum vahlianum
• Campylospermum walkeri
• Campylospermum wallichianum
• Campylospermum zeylanicum
• Campylostachys
• Campylostachys cernua
• Campylotheca australis
• Campylotheca cosmoides
• Campylotheca dichotoma
• Campylotheca grandiflora
• Campylotheca helianthoides
• Campylotheca micrantha
• Campylotheca molokaiensis
• Campynema