Katsuo Isono

Eldest son of the Isono family, a sly and quick-witted rascal

Eldest son of the Isono family and an elementary school student. A quick-witted, eloquent, and sly rascal.

Trivia

  • At the start of serialization, featured a buzz cut; later evolved into a sly and quick-witted personality.
  • In the anime version, consistently set as belonging to elementary school 5th grade class 3.
  • In early days, was a big brother figure who often looked after Wakame.
  • Known as a representative archetype of 'worldly-wise' in the manga world.

Alternate names

Katsuo Rascal Sazae's Younger Brother Eldest Son of Isono Family

Tags

Isono Family Elementary School Student Brother Family Manga National Icon Anime Character Postwar Manga Home Comedy Sly

Profile

Species
Human
Gender
Male

Appearance

Overall appearance
Typical buzz cut hairstyle, boyish-looking elementary school student.
Eye color
Brown
Hair color
Black

Personality and abilities

Core personality
Quick-witted
Detailed personality
Sly, worldly-wise, and silver-tongued rascal. More articulate than other children around him, possesses the knack for navigating troubles and difficult situations.
Keywords
  • Sly
  • Quick-witted
  • Mischievous
  • Silver-tongued
  • Worldly-wise
Talents
  • Ability to handle interpersonal relationships well
  • Trouble avoidance ability
  • Quick thinking
Skills
  • Fighting technique
  • Helping with housework
  • Pranks
Motivation
To strengthen his presence in the family and freely do what he wants.
Habits
No clear catchphrase, but frequently demonstrates quick wit and slyness.
Favorite foods
Eggs, Fish, Wakame
Hobbies
Baseball, Pranks, Outdoor play
Favorite colors
Blue, Brown
Disliked insects
Bees, Cockroaches

History

Backstory
Set as the eldest son of the Isono family at elementary school age. In the early serialization, he also gave a big brotherly impression, but in later periods, his sly and quick-witted rascal personality was strengthened, and his appearances increased. Plays a comedic role in banter with family and people around him.
Debut date
April 22, 1946
Work title
Sazae-san
Media type
Manga

Manga Serialization Start

Significant event
Manga Serialization Start
Description
Serialization began on the Fukunichi Evening Edition on April 22, 1946.

Personality Shift

Significant event
Personality Shift
Description
In the latter half of serialization, shifted to a sly and quick-witted personality, with increased appearances.

Role in TV Anime

Significant event
Role in TV Anime
Description
From the 1969 TV anime version, stably set as a student in elementary school 5th grade class 3.

Relationships

Namihei Isono

Father

Father; sometimes strict but essentially watches over warmly.

Fune Isono

Mother

Mother. Reliable pillar supporting the family.

Wakame Isono

Sibling

Younger sister. Often fight but get along well.

Sazae Fuguta

Sibling

Older sister. Frequently engage in rough wrestling fights.

Isono Family

Isono Family: unknown

Media appearances

Sazae-san

Manga / Protagonist

Serialization started in 1946

Sazae-san (TV Anime)

Anime / Protagonist

1969 TV Series

Voice cast and creators

Machiko Hasegawa

Creator name
Machiko Hasegawa
Role
Original author

Related goods

Figures

Item name
Figures
Category
Figure
Availability
Regular

Stationery

Item name
Stationery
Category
Stationery
Availability
Regular