Textbook

Daniel Zuckerman's textbook is now in use at several universities and available in Japanese translation

Cover of textbook by Daniel Zuckerman (both English and Japanese editions)
Cover of Statistical Physics of Biomolecules textbook in English (left) and Japanese (right)

Statistical Physics of Biomolecules: An Introduction, by D. M. Zuckerman (CRC Press, 2010) emphasizes the basics in an accessible way, along with key biophysics applications and some non-equilibrium topics.