was a Japanese manga artist

Mangaka

is the Japanese word for a comic artist or cartoonist. Outside of Japan, manga usually refers to a Japanese comic book and mangaka refers to the author of the manga, who is usually Japanese...

 born in Isesaki City

Isesaki, Gunma

is a city located in Gunma, Japan. The current population is 211,021, with 80,638 households. A small city located near the geographic center of Japan's main island of Honshū, Isesaki is the fourth largest city in Gunma Prefecture and it is one of the growing cities within Gunma Prefecture...

, Gunma Prefecture

Gunma Prefecture

is a prefecture of Japan located in the northwest corner of the Kantō region on Honshu island. Its capital is Maebashi.- History :The remains of a Paleolithic man were found at Iwajuku, Gunma Prefecture, in the early 20th century and there is a public museum there.Japan was without horses until...

, Japan, and the older brother of Mitsuru Adachi

Mitsuru Adachi

is a Japanese manga artist. After graduating from Gunma Prefectural Maebashi Commercial High School in 1969, Adachi worked as an assistant for Isami Ishii. He made his manga debut in 1970 with Kieta Bakuon, based on a manga originally created by Satoru Ozawa...

. Tsutomu was an assistant Fujio Akatsuka

Fujio Akatsuka

was a pioneer Japanese artist of comical manga known as the Gag Manga King. His name at birth is 赤塚 藤雄, whose Japanese pronunciation is the same as 赤塚 不二夫....

, and was known as one of the "Four Protegés of Akatsuka". According to his younger brother

Mitsuru Adachi

is a Japanese manga artist. After graduating from Gunma Prefectural Maebashi Commercial High School in 1969, Adachi worked as an assistant for Isami Ishii. He made his manga debut in 1970 with Kieta Bakuon, based on a manga originally created by Satoru Ozawa...

, his definitive works include Jitsuroku Adachi Mitsuru Monogatari, Nigun no Hoshi Hanpa-kun (a gag comic serialized in the educational magazine Jūichi Course, published by Gakken

Gakken

is a Japanese publishing company founded in 1947 by Hideto Furuoka, which also produces educational toys. Their annual sales is reported at ¥ 821 billion ....

) and Tamagawa-kun.

Tsutomu was very influential in creating the way for his younger brother, Mitsuru

Mitsuru Adachi

is a Japanese manga artist. After graduating from Gunma Prefectural Maebashi Commercial High School in 1969, Adachi worked as an assistant for Isami Ishii. He made his manga debut in 1970 with Kieta Bakuon, based on a manga originally created by Satoru Ozawa...

, to become a manga artist. He also described his younger brother as the "new star of the gag manga

Manga

Manga is the Japanese word for "comics" and consists of comics and print cartoons . In the West, the term "manga" has been appropriated to refer specifically to comics created in Japan, or by Japanese authors, in the Japanese language and conforming to the style developed in Japan in the late 19th...

 world.". He made his manga debut while in his second year of high school

High school

High school is a term used in parts of the English speaking world to describe institutions which provide all or part of secondary education. The term is often incorporated into the name of such institutions....

. After moving to Tokyo

Tokyo

, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...

, he won the 1st Shōnen Jump

Weekly Shonen Jump

is a weekly shōnen manga anthology published in Japan by Shueisha under the Jump line of magazines. The first issue was released with a cover date of July 2, 1968, and it is still circulating. One of the longest-running manga magazines in Japan, it has a circulation of 2.8 million copies...

Rookie of the Year award in 1968. Mitsuru said that he wouldn't be the person he is today if it weren't for his brother, and that Tsutomu was the one who got him to leave his small hometown in Gunma Prefecture to see the world.

Adachi died of stomach cancer

Stomach cancer

Gastric cancer, commonly referred to as stomach cancer, can develop in any part of the stomach and may spread throughout the stomach and to other organs; particularly the esophagus, lungs, lymph nodes, and the liver...

 on June 18, 2004.

Works

• Jitsuroku Adachi Mitsuru Monogatari (the story of his brother's rise to fame, Shogakukan
  Shogakukan
  is a Japanese publisher of dictionaries, literature, manga, non-fiction, DVDs, and other media in Japan.Shogakukan founded Shueisha which founded Hakusensha. These are three separate companies, but are together called the Hitotsubashi Group, one of the largest publishing groups in Japan...
  
  )
• Nigun no Hoshi Hanpa-kun (Gakken
  Gakken
  is a Japanese publishing company founded in 1947 by Hideto Furuoka, which also produces educational toys. Their annual sales is reported at ¥ 821 billion ....
  
  )
• Tamagawa-kun