■Preface
Two Years from That Day
Ichiro Terasaki......275

■Overview Articles
Amphoteric Property of Hydrogen in Oxide Materials Probed by Muon
Masatoshi Hiraishi, Hirotaka Okabe, and Ryosuke Kadono......278

■Researches
Can Lambda Particles Distinguish between Protons and Neutrons?―Charge Symmetry Breaking for Lambda Hypernuclei
Satoshi N. Nakamura, Sho Nagao, Hirokazu Tamura, and Takeshi O. Yamamoto......287

Non-Bloch Band Theory of Non-Hermitian Systems
Kazuki Yokomizo and Shuichi Murakami......293

A Vertical Transistor with Molecular Quantum Dots
Ryoma Hayakawa, Tuhin Shuvra Basu, and Yutaka Wakayama......298

Petahertz Correlated Electron Dynamics in an Organic Superconductor
Shinichiro Iwai, Yohei Kawakami, Hirotake Itoh, and Kenji Yonemitsu......304

■Physics Education
Online International Physics Olympiad
Hiroo Totsuji......310

■La Toccata
Introduction of academist Journal
Hitomi Suto......313

Job Hunting by a Doctor of Physics and Research in a Company
Kenta Miyahara......315

■JPSJ Selected Papers in the Latest Issue......317

■PTEP Selected Papers in the Latest Issue......320

■Memoir on the Screening Reviewed: FY 2021 Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science......324

■Physics Community News......328

■Obituary......329

■Book Reviews......330