Bou-chan is a 5-year-old member of the Kasukabe Defense Force in Shin Chan. While he usually looks spaced out and quiet, he surprises everyone by bringing the group together with just a single word when needed. Bou-chan is known for his ever-present runny nose, love for collecting unique-shaped stones, and many hidden talents that often surprise both his friends and adults. He stands out for his mysterious background, calm personality, quick thinking, and the unique skills he brings to his team.
Bou-chan is 116.9 cm tall and weighs 25.0 kg.
He is a 5-year-old boy with a birthday on September 10.
His blood type is AB.
His personal color is yellow.
At first, his hair was messier and he looked a little chubby, but this has changed over time.
Bou-chan often looks spaced out, just like his name suggests, but he can be surprisingly sharp and quick to act when needed.
He doesn’t usually talk a lot or stand out, but he gets very angry if someone makes fun of his nose or stone collection.
He has a calm personality, a mature way of thinking, and often stays cool even in tough situations.
He also has a strong sense of justice and wants to make things right.
Bou-chan’s real name is not known, though one guess is "Igawa Boutarou," but this is probably not true.
Unlike his friends, almost nothing is known about his family.
His mother has appeared as a shadow, and he is hinted to have an older sister.
In the manga New Shin Chan volume 7, both his mother and father appear (but their faces are hidden), and the family keeps a pet snail named Tsumuro.
In the anime episode "Let’s Knit Together," Bou-chan’s grandmother also appears.
Bou-chan’s locker always just says "Bou~" instead of a full name.
Bou-chan’s best skill is being able to hide his presence.
His constantly dripping right nose can be controlled freely, making it useful as a trick or even as a weapon in games and movies.
If his nose stops running, he loses his sense of balance until it comes back.
He knows random things like how to drive a school bus or start a motorboat, reads complex kanji on teacups, counts stitches on a baseball instantly, and even writes with the skill of a professional calligrapher.
He is neat and likes things to be in the right place, like making sure a remote control is not crooked.
He is physically strong, running and winning races against even the fastest kids in kindergarten.
Bou-chan can cook his own lunch and has many hidden talents.
Bou-chan is Shin Chan’s closest friend, even in stories about the future.
He often joins in strange games with Shin Chan, Nene Sakurada, Masao Sato, and Tooru Kazama, and helps the Kasukabe Defense Force solve problems together.
He stands out as a trusted and calm leader in the group.
Shin Chan respects Bou-chan for his knowledge, courage, and all his talents.
In China, Bou-chan is called "A Dai," where "A" means "little" or "dear," just like "chan" in Japanese.
He often says "Boo" as a reply or when showing feelings.
In one extra segment, Bou-chan only said "Boo, Boo, Boo-boo" during his voice over, and jokingly announced the next show as "Bobobo-bo Bo-bobo." However, that episode was not actually broadcast because of a special news report.
He has a special connection with his runny nose—without it, he feels lost.
He also becomes very upset if someone mocks his interests.
"Anywhere is fine. We’re still on Earth, so there’s nothing to be afraid of."
"I’m just a passing member of the Kasukabe Defense Force!"
Role in the Kasukabe Defense Force
Bou-chan is a key member of the Kasukabe Defense Force.
He is bigger than the other members and introduces himself with just, "Please call me Bou-chan!"
Even though he is quiet, his words are powerful and can bring the team together.
He is famous for collecting unique stones, believing every stone is special.
Special Skills and Quirks
His best move is hiding his presence, which helps the team in tough situations.
Bou-chan’s nose runs all the time, and he can control it to perform tricks or as a weapon.
When his nose is wiped, his balance gets weird until the nose starts running again.
He has all sorts of random knowledge, like how to drive a boat or a bus, read hard kanji, instantly count baseball stitches, and write beautifully.
He’s neat and can’t stand crooked things like remotes.
In early episodes, he moved slowly, but he actually has good athletic skills and can win races.
Family Mystery
Unlike other members, Bou-chan’s family is a mystery.
His mother appears only in shadows, and he has a much older sister.
In New Shin Chan volume 7, his parents are shown with their faces hidden and they have a pet snail.
His grandmother is shown in the anime as well.
Now, all his friends know where he lives.
Shin Chan, Nene, and Masao imagine Bou-chan’s mom as a bigger version of him with the same tone, while Tooru thinks of her as a beautiful lady.
Despite the mystery, Bou-chan always helps out and is very close to his friends.
Special Moments and Adventures
Bou-chan sometimes plays strange games with Shin Chan, even pretending to play dead.
He helps Shin Chan chase away bullies who bother Masao or animals.
At first, Bou-chan didn’t even speak, and he looked a bit different—messy hair and a rounder face.
He can eat most foods, but he hates "kusaya," a type of stinky dried fish.
He once ate a whole green pepper on TV.
Dreams for the Future
Bou-chan has many dreams for the future: he wants to be a pilot, a visual rock band singer, a famous artist, an inventor, and even wants to open a stone museum because of his love of stones.
He is also good at abstract painting.
In an interview in 2018, his voice actor said that because Bou-chan is quiet, he has to put deep feelings into every line. People often joke that Bou-chan steals the show with just one word.
As the series went on, Bou-chan’s voice became lower, making it harder for his actor to say long lines.
Movie Highlights
- In "The Storm Called: The Jungle," only Bou-chan goes on a trip alone without his parents, showing his independence. He starts a motorboat with no problem but makes some mistakes in the jungle.
- In "The Adult Empire Strikes Back," he drives a bus just by watching once, even handling a manual transmission, but crashes it because he is still a child.
- In "Bravo! Samurai Battle," Bou-chan appears only in the modern part, but a lookalike ancestor shows up in the old Japan scenes.
- In "Sunset on Kasukabe Boys," Bou-chan lives like a quiet native in the film’s western world and is one of the few who remembers his real memories. He even uses his nose as a whip in the final battle.
- He is brave in "B-grade Gourmet Survival!" and acts as the team’s spokesperson.
- In "Mystery! Hana no Tennkas Gakuen," he falls in love but gets turned down.
Bou-chan has many future dreams: pilot, rock band vocalist, a great inventor, and artist.
He also wants to open a stone museum.
As Shin Chan’s voice actor started speaking in a lower tone, Bou-chan’s voice also became lower, and long lines make him run out of breath.
Bou-chan is known as the quiet, mysterious, and surprisingly talented member of the Kasukabe Defense Force, always ready to help his friends in both small and big ways.
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