If you enjoy Taisho and early Showa era design as much as I do, there’s a treasure trove of images on 50 Watts, a book design blog.

Source: 50 Watts
The images are curated from Bookcover Design in Japan 1910s-40s (ISBN 4-89444-426-7), edited by Masayo Matsubara (2005 by PIE Books). Since the book is out of print, this online resource should prove useful for those studying visual anthropology , history, and art/design.
Extraordinary early 20th century book covers from Japan part 1
Extraordinary early 20th century magazine covers from Japan part 2
25 Vintage Magazine Covers from Japan
Via Open Culture