■Preface
Will Academic Publishing in Japan Outlive the Global Competition?―a Followup
Mitsuaki Nozaki......685

■Recollections: Special Episodes "Commemorating Prof. Koshiba"
Introduction......688

Early Days of Prof. Koshiba's Laboratory
Sakue Yamada......690

Experiments in Europe
Hiroshi Takeda......692

Grand Unified Theory and Kamiokande―Memory of Prof. Koshiba
Hirotaka Sugawara......694

An Episode on the Origin of Kamiokande
Yasushi Watanabe......696

Start-Up of Kamiokande
Atsuto Suzuki......698

Kamiokande and Its Results
Masayuki Nakahata......701

Memory of Prof. Koshiba
Gyo Takeda......703

■Overview Articles
The Massive Black Hole Candidate at the Center of Our Galaxy and the Test of Gravity Theory
Hiromi Saida......705

How Can We Describe the Conformational Change of Proteins?―Advances in Path Sampling Techniques for Biomolecules
Yasuhiro Matsunaga, Kei Moritsugu, and Hiroshi Fujisaki......714

■Researches
Ion Desorption Caused by Positron-Electron Pair Annihilation
Takayuki Tachibana and Yasuyuki Nagashima......723

Block Layer Concept for Exploring Strongly Correlated Dirac Materials
Hideaki Sakai......729

■JPSJ Selected Papers in the Latest Issue......735

■Obituary......738

■Book Reviews......739