During the 1970s, more and more people started to like manga. At the same time, manga were used as the starting point to make anime with the same characters and stories. Animators would take the drawings done by a manga artist and the stories the manga artist wrote, and turn them into the stories and characters of a similar anime. At that time Osamu Tezuka became very popular. Now he is called a "legend" and the "god of manga". Tezuka and other pioneers of anime made a lot of types of stories and styles that are common to anime today. The giant robot genre (known as "mecha" outside Japan) began with manga and anime from Tezuka's ideas. Robot anime like Gundam and Macross became classics in the 1980s. Today, the robot genre is still very popular in Japan and worldwide. In the 1980s, anime became very popular in Japan, and saw an increase in production. (Manga is much more popular than anime in Japan). There are a lot of different kinds of anime that many different kinds of people like besides Mecha, and there are types of anime based on the age of the people (e.g. "seinen" or "shōnen") who might like it or the subject of the anime.