- His real name is Sakaguchi Heigo.
- When Ango was 15, a 2-meter tall dick made out of snow was found in front of his school one morning. Ango's reputation was such that rumor asserted he was responsible for its construction, although there was never concrete proof that he did it.
- During his adolescence, Ango was expelled for punching a teacher; in the wake of this incident he was immediately summoned back home to live under the care of his estranged parents. When his former classmates flipped up his old desk, they found he had carved a message into the wood: "I shall become the grand delinquent, rising again one day in the annals of history." 
- He proved to be true to his word when he was subsequently featured in magazines and newspapers for public nuisances as much as he did for his actual literary works; two of the most prominent scandals involved a mudslinging match with tax officials and accusations of a betting scam at a bicycle racetrack. (These were two separate events)
- Ango was a notorious truant in school, much to the frustration of his teachers. When he actually showed up to his classical Chinese class one day, his teacher exploded in rage and disappointment at him. The 'hei' in Ango's given name Heigo refers to meaning 'bright', or 'clear', so his teacher apparently screamed, "Being so in the dark concerning who you are, you will hereafter be known as 'Ango'." He would eventually adopt this as his pen name, though he did not use the character for 'dark' as his teacher originally did.  
- Ango was a slow writer who often procrastinated as much as he dared. He turned to stimulant drugs like speed to keep himself awake for days at a time in order to meet his deadlines. When he had finished his work, he would drink and take sleeping pills so that he could rest — this became a vicious cycle for him.
- Some of his earlier work in magazines were translations of French literature, but because his editor would only show up at his door to demand a translation the night before a deadline, he would often skip out sections with too much unfamiliar vocabulary.
- When Ango was rehabilitating from his struggles with drug addiction, he once relapsed, swallowed a handful of sleeping pills, and then proceeded to (somehow convince his wife to) order enough plates of curry rice to feed 100 people while under the influence.
- When Ango's wife, Kaji Michiyo, first visited his home, she found his entire room covered in white powder. Ango informed her it was powdered DDT, an industrial-grade pesticide so toxic that it has now been banned almost worldwide. Apparently, he used it to keep the bugs out because he didn't want to clean.
- Moreover, he also refused to clean up the corpses of the bugs that died as a result of his pesticide. Ango believed that if he let them rot after a year, they'll become part of the other garbage he has lying around, following the "laws of nature" (whatever that means, anyway)
- Ango dreaded the thought that he might drown if he were drafted into the military and his ship capsized, so in order to safeguard himself against that possibility, he swam in the waters by his hometown of Niigata to build up his stamina. When he moved to Tokyo during the war, he opted for cold water baths as a substitute; one bath in winter almost killed him.
- When the air raids hit Tokyo, instead of fleeing to the countryside, Ango insisted on staying behind to watch the war unfold from the front lines, though he claimed to be "twice as scared as the next guy" — "in exchange for risking my life, I intend to enjoy the spectacle of the century."
- One of Ango's elder sisters married into a sake brewer family. Ango paid them frequent visits and every time, he would never fail to leave dead drunk.
- Ango may be known mostly for his essay work and short stories, but he has also published a number of mystery stories, the most famous being Furenzoku Satsujin Jiken (A Case of Non-Serial Murders). This particular story was praised by Edogawa Ranpo and also earned him the second Mystery Writers of Japan award in 1949. 
- Nakahara Chuuya and Ango once met in a bar and "fought"— Chuuya fell for a waitress who was in love with Ango at the time, so he decided to pick a fight, only to be spooked by the height difference between himself and Ango. Instead, Chuuya settled for punching at the air about 1 meter away for 5 minutes straight before sitting back down. Both men were drunk at the time.
- This is also when Ango grossly underestimated Chuuya's height to be around 140cm. In reality, Chuuya was around 150cm in height. (Ango himself was approximately 170cm)
- He died at age 48 due to severe cerebral hemorrhaging.
- Scribner Writers Series: Modern Japanese Writers, 2000
- Literary Mischief: Sakaguchi Ango, Culture, and the War, 2010