Read more about Ayumu Kasuga at: Wikipedia

Official Site: Dengeki Daioh

, more commonly known as , is a character from the anime and manga series Azumanga Daioh.

She was voted 7th in the top 100 poll, "Anime Heroines of 2002" by readers of the Japanese anime magazine Newtype in 2003.

Ayumu Kasuga is a transfer student from Osaka. Tomo Takino, expecting her to act like the stereotypical Osakan—loud, exuberant and fond of bawdy jokes—chose for her the nickname "Osaka", although Ayumu's behavior could not be more different. Ayumu considers herself "slow" and "spacey" - but she lacks the energy or motivation to dispute it. The nickname sticks so well she is called 'Osaka' by teachers and even in the class roster, to the point that no one even remembers her real name (Yomi has a similar problem). In the manga, Osaka mentions that she lived in Kobe when she was in elementary school and was born in Wakayama. Tomo, who says she doesn't know where Wakayama is, tells Ayumu to "just be Osaka".

Despite her non sequiturs and a tendency to nod off during lectures which upset her teacher, Yukari Tanizaki, she remains in Yukari's homeroom class for all three years. Because of her poor performance on exams, she is a member of the "Bonkurazu" (translated as "Knuckleheads" or "Bonkers" in the anime and "Numbnuts" in the manga). Her decision, on Chiyo's advice, to seek a teaching career after graduation is viewed by Yukari as a deep personal insult.

Ayumu Kasuga has not been a contender in any CBUB matches.