Outstanding Paper Assard Subcommittee of Kagaku Kogaku Ronbunshu has assessed the 93 papers published in vo1ume 37 into 2011, and the editorial board finally selected the two papers for Kagaku Kogaku Ronbunshu Paper Awards of 2011; those are the papers on "A Numerical investigation of the factor Decreasing Transfer Efficiency in a High-Speed Rotary Be11-Cup Atomizer," and "A Novel Visualization Technique for Distinct Streaklines"