Saitama is the main protagonist of One Punch Man series created by ONE. For Saitama I can say that he is pretty much an ordinary man except for a very well-built physique and of a normal height and weight. Nothing special about him except the fact that he can solve every problem with one punch.
More than three years prior to the start of the One Punch Man story line, Saitama was an unemployed man on a job hunt. One day, after yet another failed interview, a nihilistic-feeling Saitama was wandering the streets and encountered a villain called Crabrante. From that moment on, Saitama’s hero story begins!
#1 ONE wanted for Saitama to appear simple for one obvious reason.
ONE decided to go with a rather simplistic design for Saitama because there are way too many superheroes that look “cool”. In ONE’s opinion, coolness comes from one’s spirit not looks.
#2 Saitama was based off of Anpanman.
Anpanman’s costume consists of a red jumpsuit with yellow gloves. If you reverse the colors, you will get Saitama’s costume color combination.
Anpanman is a picture book series written Takashi Yanase who during the Second World War experienced starvation many times which made him dream about eating anpan (a bean-jam filledd pastry).
#3 Before becoming a superhero, Saitama worked in a convenience store.
This was confirmed in One Punch Man: Hero Perfection Q&A by ONE and it was also shown in ONE’s picture dairy on his old homepage. There is a scene where a robber is pointing a knife at Saitama and all Saitama did was wonder where is the barcode of the knife. Saitama thought that the knife was one of the merchandise.
#4 Saitama stole a move from Gon Freecss.
At the end of One Punch Man opening, Saitama makes a reference to Hunter x Hunter with us never noticing that. You can see how Saitama is placing his left hand over his right hand while preparing to land a blow. This is a parody of Gon Freecss’s attack “Rock”.
#5 ONE used Saitama to reference his other work.
There have been many Mob Psycho 100 references in the One Punch Man series (and vice versa):
- Saitama appears on Arataka Reigen’s cellphone as a background picture.
- Shigeo Kageyama, better known as Mob, the protagonist of Mob Psycho 100, has a facial expression identical to that of Saitama himself.
- In one scene you can see young Saitama wearing a shirt on which is written Mob Psycho 1000000.
- Saitama has a Mob Psycho 100 manga on the floor near his futon in Paradise Group.
- Saitama has a cameo appearance in a dream sequence in chapter 80.5 of Mob Psycho 100.