This is extremely fascinating. It's uncanny how the mangka embody their works. Some of the mangaka even resemble their own characters. For example, Hideo Yamamoto has an uncanny resemblance to the main character in Homunculus.
Both of these sites are in Japanese by the way.
If you have a hard time figuring out who is who just look at image properties of the photos and you'll the get the last names of the mangaka. If that isn't enough for you then just highlight some of the titles under "ä»£è¡¨ä½œï¼š" and go here (Wiki's list of manga)
, "ctrl+f", and you'll probably
find it. Google is good too.