In Tezuka Osamu's "Sekai o Horobosu Otoko," there's a page that features a cameo of Fukui Eiichi wearing a halo. This work was published several months after Fukui's death

Many might consider the drawing in Tezuka Osamu's early works to be rough, but there's a reason behind it! When photograpic printing was rarely used back then, publishers would produce manga pages by tracing the original work into a printing plate. This technique was called "Kakihan"

When Tezuka Osamu was a little child, one of the manga he used to love to read was Shaka Bontaro's "Mikki no Katsuyaku!" You can see how it influenced some of Tezuka's early manga works.

This here is the cover art for Tezuka Osamu's "Manga Daigaku!" As you can see in the second picture, the cover art was changed slightly. The reason was to avoid 'copyright issue.' Hmm... I wonder what they meant by that?