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The origin of the world's sushi boom is this man!! His name is Hanaya Yobei!! The time is the Edo period of the Bunsei era. Although it was a popular sushi among the common people, it was called ``pressed sushi'' and ``familiar sushi,'' and was looked down upon and derided as ``waste'' in restaurants. At that time, a man appeared who wanted to take over the world with sushi. The unconventional sushi invented by that man, Yobei, is Edomae-style “nigiri sushi”!!
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Two part manga released in 1978-1979 in Weekly Shōnen Jump, notable for being Toriyama's first published manga. Wonder Island marks the debuts P-Man, who makes appearances in Dr. Slump, as well as Gyaosu, Gala and Pagos who later become recurring characters in Dr. Slump.
Jiora is a policeman from the planet Biretijon. One day, his ship crashes on Earth while he was pursuing dangerous criminals in space. He repairs his ship but, short of fuel, he has to take the appearance of the man he accidentally killed when he arrived on Earth, Chapat, a lazy and coward policeman from Slope Town. To raise the sum of 17 million yen needed to buy fuel for his ship, which is gold, Jiora fights crime for money as Cashman, resuming his extraterrestrial appearance. (Source: Dragon Ball Wiki)
Mr. Ho is a one-shot manga, drawn by Akira Toriyama, featuring a Yamucha-like character as the protagonist. It's story is similar to Dragon Ball`s Red Ribbon Army Saga. Mr. Ho is seen wielding a bazooka, much like Yamcha in the beginning of Dragon Ball, and defeats the entire army in the same manner Goku defeated Red Ribbon Army. This one-shot also features Bulma-like character.