This is the Journal of the Japanese Society of Fisheries Science, Vol. 81, No. 4. Foreword ・Vision of Advanced Country-Type Fisheries Introduction of Award-Winning Papers of the 2014 Academic Year ・Resource Biological Characteristics of Japanese Eel in Various Regions of Japan ・Development of Genetic Sex Determination Method for Tiger Pufferfish and Cases of Sex Reversal in This Species ・Structural Changes and Imperfect Competition in the Japanese Fisheries Distribution Market ・Concentration of Radioactive Cesium in Small Pelagic Fish (Japanese Sardine, Japanese Anchovy) in the Kashima-Boso Offshore Area and more. Reports ・Relationship between Distribution Density and CPUE of Japanese Flying Squid under Squid Jigging Vessels ・Winter Depletion of Ayu Resources in Lake Biwa and Environmental Factors ・Feeding Effect of Echizen Jellyfish as Supplementary Feed for Filefish and more. Symposium Record ・New Developments in Research on New Protein Calycin in Fish: α1-Acid Glycoprotein, Pufferfish Toxin Binding Protein, Eel Fluorescent Protein There are several other topics. The cover has a slightly worn feel, but the contents are clean.