Hidetoshi Dekisugi (出木杉 英才), born April 15th, 2001, is Nobita's classmate and rival for Shizuka's affection. He always gets perfect scores on his tests, but never shows off his abilities. Hidetoshi Dekisugi is highly talented and he is also good at soccer. He willingly helps Nobita whenever he has philosophical or scientific questions. His name literally means "brilliant over-achiever", and his last name is a pun on dekisugiru, which means "over achieving". Unfortunately for Nobita, Shizuka tends to prefer the company of Hidetoshi, who is more of her intellectual equal, which leads to Nobita connoting bizarre schemes with the help of Doraemon's gadgets to keep them apart. In the future, he becomes an astronaut, gets married, and has a son named Hideo..
He is a good friend of Shizuka Minamoto. He often spends his time with her. He is very intelligent. He often does his homework with Shizuka. He also likes to cook with her in her kitchen. Nobita is often found to be jealous of him.