■Preface
Predicting the Future of JPS Meetings
Tomi Ohtsuki......321

■Researches
Dynamical Systems Modeling of a Low-Temperature-Differential Stirling Engine towards Physics of Autonomous Nonequilibrium Heat Engines
Yuki Izumida......324

Exploring Physics in the Early Universe through the Intergalactic Void Magnetic Fields
Kohei Kamada......329

Quantum Information Measures for Mixed States and Holographic Principle
Kotaro Tamaoka and Koji Umemoto......335

Coherent Spectroscopy of Multiple Excitons in Semiconductor Nanomaterials
― Ultrafast Spectroscopy for Photovoltaic Engineering
Hirokazu Tahara and Yoshihiko Kanemitsu......340

■Experimental Developments
The Path to the Material Science under Ultra-High Magnetic Fields Exceeding 1,000 Tesla
― Achievement of the World Record of the Magnetic Field Generation Using Electromagnetic Flux Compression
Daisuke Nakamura......346

■Physics Education
International Physics Olympiad and Future Issues ― Participated in the IPhO2019 Israel
Tadao Sugiyama......355

■JPSJ Selected Papers in the Latest Issue......360

■La Toccata......364

■Book Reviews......365