A TV show THE MOST USEFUL SCHOOL IN THE WORLD introduced the all time best-selling books in Japan. Here is the list of those books.
No.1
Totto‐chan
written by Tetsuko Kuroyanagi
Genre: essay, autobiography
5.809 million copies
No.2
The Path: Find Fulfillment through prosperity from Japan’s Father of Management
Konosuke Matsushita
Genre: essay for business
5.2 million copies
No.3
Harry Potter and the Philosopher's Stone
J. K. Rowling
Genre: novel
5.1 million copies
No.4
No One's Perfect
Hirotada Ototake
Genre: essay, autobiography
4.793 million
No.5
The Wall of Fools
Takeshi Yoro
Genre: essay
4.395 million
No.6
Harry Potter and the Chamber of Secrets
J. K. Rowling
Genre: novel
4.33 million
No.7
A Great Revolution in the Brain World
Shigeo Haruyama
Genre: nonfiction, health care
4.1 million
No.8
Harry Potter and the Prisoner of Azkaban
J. K. Rowling
Genre: novel
3.83 million
No.9
Who Moved My Cheese
Spencer Johnson
Genre: business book
3.602 million
No.10
Anglo-Japanese Conversation Manual
Kikumatsu Ogawa
Genre: handbook of English conversation
3.6 million
Published in 1945
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Source is a TV show THE MOST USEFUL SCHOOL IN THE WORLD aired on 2015 May 23rd.