While today we speak of “the anime industry” like it’s something obvious, that wasn’t always the case. When animation started in Japan around the 1910’s, it was still very much a rudimentary process ; and even after WWII, with the creation of the first major Japanese studio, Toei Animation, things were still very different from now. In this first essay, I will show how anime became the “industry” we know today : an entire sector sharing common business practices and production processes. As I’ll do during the entire series, I’ll mostly focus on TV animation : the starting point will therefore be 1963, the generally accepted date of anime’s birth.