http://www.e-douwa.com/index.html
You can change the language to English to select the book(s) if needed. Please make sure to change back to Japanese to read the book(s) in Japanese.
http://www.e-hon.jp/index2.htm
You can change the language to English to select the book(s) if needed. Please make sure to change back to Japanese to read the book(s) in Japanese.
http://hukumusume.com/douwa/pc/world/index.html
This site offers daily folktale around the world audio. You can click each month to find the one you would like to listen in Japanese. Japanese only - I am so sorry.
https://www.youtube.com/playlist?list=PLit5nYjjvNPXbmJ0LosnmXpmNL9xx1HPj
This is the playlist of picture books video in Japanese. Japanese only - I am so sorry.
This site is unpublished books uploaded by authors - again, this site is in Japanese. I will try to pick the books to recommend.