■Preface
Internationalization in Academic Society
Setsuko Tajima......1
■Overview Articles
Recent Progress on the Study of High-Tc Superconductivity
Takahiro Misawa......4
Neural Networks for Many-Body Physics
Nobuyuki Yoshioka......14
■Researches
Direct Observation of Magnetic Friedel Oscillation at the Fe(001) Surface
Takaya Mitsui, Seiji Sakai, Makoto Seto, and Hisazumi Akai......23
Nonlinear Optical Responses in a Twisted Bilayer Graphene―A Dynamical-Symmetry Viewpoint
Tatsuhiko N. Ikeda......29
Mechanism of DNA Damage by Tritium―Fluorescence Microscope Observation of Double-Strand Breaks and Simulation
Susumu Fujiwara, Yuji Hatano, and Hiroaki Nakamura......35
■Physics Education
Why Are Stars So Large?―Learning from Competition Problems of the International Physics Olympiad
Masatoshi Namiki......42
■JPSJ Selected Papers in the Latest Issue......47
■PTEP Selected Papers in the Latest Issue......50
■La Toccata
Front and Back Stories of the Physics-Related VTuber
Shunsaku Kitagawa......53
Nuclear Photonics as a Field Bridging Photons and Nuclei
Akifumi Yogo and Atsushi Tamii......55
■Physics Community News
15th Yukawa-Kimura Prize: Dr. Tatsuma Nishioka
Tadashi Takayanagi......57
■Book Reviews......57