Azumanga Daioh Wiki
Koyomi Mizuhara
Koyomi in a color insert from the Azumanga Daioh manga.
Japanese 水原 暦
Romanized Mizuhara Koyomi
Gender Female
English voice actor Nancy Novotny
Japanese voice actor Rie Tanaka (Television series/very short movie)
Satsuki Yukino (Web short)

Koyomi Mizuhara (水原 暦 Mizuhara Koyomi), better known as Yomi (よみ Yomi), is one of the main characters from Azumanga Daioh.

Her name was left unknown until the second volume, in which Azuma dedicated an entire strip to her in response to readers asking for her name. Her name is a pun, and alternately means read between the lines, in reference to her name being left "between the lines" until the strip in question. Koyomi is also Japanese for almanac.


Koyomi Mizuhara full body

Yomi in her winter uniform, as she appears on the cover of the monthly 2002 calendar.

Yomi is a grade-school friend and general antagonist of Tomo's. She is also the voice of reason, and the most mature and serious of her friends — and as such, the comic foil to the others' silliness. Yomi, if pushed enough by Tomo, will even give her an uppercut that leaves Tomo unconscious on the floor. While Yomi likes to think that she's above her classmates' childish behavior, she can be just as bad as they are. For example, to pass her college entrance exams, she asked Chiyo to infuse an amulet with her intelligence (as Tomo and Osaka had done before).[1] Yomi tends to hide her own childlike sides when around friends, as shown when she pretended that she did not care so much about going to the theme park the first time, but when she was alone, she was more excited than any one of the others and had even bought some guide books.[2] She was also impressed with the first snow of the year once,[3] and had bought a guide book when the gang went to Okinawa which surprised Chiyo-chan because Yomi attempted to have a rather neutral attitude.[4] Yomi also has a rather evil sense of humour, shown when she took part in teasing Osaka when she had the hiccups (after causing them in the first place by deliberately feeding her something too spicy for Osaka to handle).[5] It is suggested that she is much like her physical education teacher, Minamo Kurosawa, much as Tomo is similar to their homeroom teacher, Yukari Tanizaki.

Yomi is both smart and athletic: out of the girls, her grades are second only to Chiyo-chan's, and while she isn't as good as Sakaki or Kagura at sports, she holds her own.[6] Despite appearing healthy and fit, Yomi is dissatisfied with her weight and struggles with her fondness for food, particularly sweets and spicy dishes.[5] She is constantly trying new diets, and sometimes anonymously writes to radio talk hosts for advice or with updates on her progress, which amuses Tomo.[7] Yomi is also a terrible singer, as shown when the girls sing karaoke one Christmas[8] (ironically, her seiyū, Rie Tanaka, is known for her beautiful singing voice). It was also revealed in Azumanga Daioh: Supplementary Lessons that Yomi hates cicadas. Despite her good academic abilities, Yomi was the last of the friends to pass a university entrance exam.

She is the last of the cast to have her name revealed in the manga: While the rest are listed in the first manga volume, Yomi's was revealed in volume 2 during the March part 1 chapter.

Similarities between Yomi and Minamo[]

  • Both have a childhood friend who they have known for a long time (Tomo for Yomi, Yukari for Minamo).
  • Both are shown to be responsible, though occasionally act childish or silly.
  • They each have something a friend enjoys teasing them about (Tomo about Yomi's fondness for food and her diets, Yukari about the fact that Minamo is a P.E. teacher).
  • They're sensitive about their love lives (only shown once with Yomi, when Osaka pointed out to her and Tomo that neither of them has a boyfriend, whereas with Minamo Yukari brings it up to embarrass her).


  • She's 161 cm tall.
  • In the manga, Yomi's name was revealed in the 2nd volume, while in the Anime it was revealed in the first episode.
  • In episode 17, when Koyomi sings, she is shown (or rather heard) singing lines from one of Chiyo's Character Songs: SARABAI! ~Happy Hen.
  • Yomi has hay fever, like Osaka.[9]
  • She was supposedly born in 1984 (or 1983).[10]
  • Due to her name being revealed so late in the series, Yomi was originally known simply as "Meganekko" (メガネっ娘, meaning "Glasses Girl") among fans and was referred to as such in the first Japanese Dengeki Daioh character popularity poll.[11]

Character songs[]

Voice Actors[]

television series and movie[]


Rie Tanaka

Azumanga Web Daioh short[]


Satsuki Yukino


Nancy Novotny

See also[]


There is a gallery available on Azumanga Daioh & Yotsuba&! Wiki for Koyomi Mizuhara.


  1. See Chapter 41.
  2. See Chapter 16.
  3. See Chapter 27.
  4. See Chapter 32.
  5. 5.0 5.1 See Chapter 18.
  6. She is never seen doing as badly as Tomo, Osaka or Chiyo in sports, and in Chapter 10, Tomo acknowledges that Yomi is a good athlete.
  7. See Episode 19.
  8. See Chapter 10.
  9. See Chapter 14.
  10. In Chapter 16, the theme park guide says that the year is 2000, and while Yomi's birth month is unknown, Japanese second year students are typically 16 in their second high school year. 1984 is 16 years prior to 2000.
  11. Azumanga Daioh on Japanese Wikipedia