| Abbreviation | Definition |
|---|---|
| IWC | International Whaling Commission |
| IWI | Index Of Watershed Indicators |
| IWRA | International Water Resources Association |
| IWRC | International Waters Resource Centre |
| IWS | Industrial Water Supply |
| JAMRI | Japan Maritime Research Institute |
| JAMSTEC | Japan Marine Science and Technology Center |
| JAPACS | Japanese Pacific Climate Study |
| JASIN | Joint Air- Sea Interaction Program |
| JAWF | Joint Agriculture-Weather Facility |
| JCCFEP | Joint Commission on Cooperation in the Field of Environmental Protection |
| JCCSWO | Joint Committee on Cooperation in Studies of the World Ocean |
| JCCSWO | Joint Committee on Cooperation in Studies of the World Oceans |
| JCFC | Japan-China Joint Fisheries Commission |
| JCH | Journal Of Contaminant Hydrology |
| J-COARE | Japanese COARE |
| JDFR | Juan de Fuca Ridge |
| JECSS | Japan and East China Seas Study |
| JEDA | Joint Environmental Data Analysis Center |
| JERS-1 | Japan Earth Resources Satellite |