he didn't......
Never. It was a fan-made Doujinshi, not an actual series by Toei Animation or Akira Toriyama.
Akira Toriyama was born on April 5, 1955.
Akira Toriyama is 62 years old (birthdate: April 5, 1955).
Dragon Ball Z is creating from Akira Toriyama from Japan!
I hate to break it to you, but I'm not the genealogy expert here. Akira Toriyama's parents are named as Takashi Toriyama and Hatsue Toriyama. So, there you have it, the proud creators of the man behind Dragon Ball.
Akira Toriyama attended the Yamaguchi Prefectural Industrial High School, but he did not attend college. He pursued a career in manga and art instead of furthering his education.
After Dragonaball Z had ended, TOEI Animation asked permission from Toriyama to continue the Dragonball trilogy with a new series called Dragonball GT. This new series aired in Japan from 1996 to 1997, and was no where near as successful.
Akira Toriyama.
Akira Toriyama
Akira Toriyama
in Japanese
Akira Toriyama drew the Dragonball and Dragonball Z mangas. After that, Toei Animation made it into an anime and it first aired on Fuji TV.