Kakegurui Wikia

New Releases: Kakegurui Volume 18
July 22, 2024: Kakegurui Twin Volume 15


Kakegurui Wikia
Kakegurui Wikia

Hyakkaou Private Academy is an educational institution where students from powerful families in the political and financial world attend. As the school that Yumeko Jabami, Ryota Suzui, and Mary Saotome go, it is also the main setting in Kakegurui.


Hyakkaou Private Academy was founded 122 years ago in Japan and for many years since its inception, was a school where students from powerful families in the political and financial world attended. It is a school where students are not evaluated by studies or sports, but through the social status they possess. This is because studies and extracurriculars are not necessary for people who are destined to have power over others. For them it is important to be well versed in tactics, reading an opponent, and the strength to grasp victory which are abilities they have to prove and obtain through gambling.

As shown during Souko Jabami and Kabura Tsuibami time as students, the school building’s interior prior to Kirari Momobami’s takeover was of a much older fashion, resembling a more traditional Japanese school building than the current modern-western design. As shown, students still gambled using the rooms of the school after classes. But gambling itself was also shown to have been less rampant during this time and was shown to be seen as more of a pass time or a after school activity, albeit the students themselves still used real money.

Two years prior to the start of the series, Kirari Momobami upset school tradition after winning a gamble from the former student council president, creating the Housepet system to reinforce an already existing caste system. The pet system consequently increased discrimination among the students: those who weren't good at gambling were oppressed, seen as just housepets and were constantly bullied. Meanwhile, the victors were praised.


Hyakkao Private School has a not very strict dress code, since the institution doesn't exactly focus on good grades and good physical performance; for example, Erimi Mushibami and Yuriko Nishinotoin don't even wear the standard uniform; also, apparently it is not mandatory for the student to wear the uniform made to their sex, as Rei Batsubami wore the male even though she was a girl.

The uniform consists of a white button-down long-sleeved shirt and a red blazer with gold buttons. The boys wear a black tie and gray pants, while the girls wear a black cross tie and gray skirt. As the dress code appears not to be so strict, some students use it in different ways: Jun Kiwatari doesn't wear a tie and leaves his blazer open; Ibara Obami wears a tie, but leaves his blazer open with the sleeves folded down to below the elbow and the pants are also folded down to below the knee, he also doesn't wear socks; Sachiko Juraku was not wearing a cross tie, but a regular tie.

When it comes to the women's uniform, there is no mandatory type of sock for them to wear, as many girls have different types. For example, Runa Yomotsuki wears striped socks and Itsuki Sumeragi wears black socks with star prints on the side. Skirt size also varies; most wear it mid-thigh, but a few girls like Nanami Tsubomi and Sayaka Igarashi wear it just above the knee. Some students like Kurumi Kurume and Midari Ikishima wears a red sleeveless vest instead of a blazer; in fact, the first one doesn't use a crossed tie and leaves the shirt open enough to reveal a good part of her bust and bra. Chitose Inui is another example as she uses a red bow.

During the summer, the long-sleeved shirt and blazer are replaced by a short-sleeved version. Kirari wears a version with the bishop sleeve shirt cut off at the shoulder .

"Non-cooperative students" (ie, with debt they cannot pay) are always wearing a pet tag around their neck.

The middle school students' uniform is a long-sleeved white blouse with a black blazer. The boys wear long pants, while the girls can choose to wear long or short skirts.


Hyakkao Private Academy. A hierarchy exists at this prestigious school. It's not grades or athletic prowess that gets you to the top. Just your gambling skills, nothing else.

Ryota Suzui on the school system in "A Boring Girl".

Volume 1 Pet System explanation image

The "Pet" system.

See also: Housepet

Gambling at Hyakkaou Private Academy is governed by the student council. It is known that the student council members use their powerful influence to collect money from students of Hyakkaou Private Academy. Payment of it is called a "donation", where it is optional but is practically obligatory.

Hyakkaou Private Academy has a ranking system which can be given to students that have failed to donate to the school. Those under 100 of the 3,000 students or who have accrued a massive debt that they cannot pay are recognized as a "housepet". If a student is a male, they will be called "dog" (pochi), if the student is a female, they will be called "cat" (mike). The hierarchy in Hyakkaou Private Academy is absolute where no student can go against it, and if they do, they will await the student council's reprisal. If the student wants to rid themselves of their "pet" status, they have to donate but it will be impossible if the student has either a massive debt to pay off or no money to pay their way out of their status. The hierarchy is described as a perfect dead end which is known by the students as something that is extremely hard to escape.

Official Matches[]

A formal match is the one right given to a house pet. A pet has the right to challenge anyone to a match once. If the betting amount is reasonable, you're not allowed to refuse. It's traditional for members of the student council to accept them with no upper betting limit. Sometimes, the house pets will challenge them for one big game.

—Ryota on pet rights in "Slit-Eyed Woman".

The Official Matches (公こう式しき戦せん Kōshiki Sen) are a unique right given to students whose rating is a Housepet. These students are allowed to challenge any other student in the school to a wager which is generally non-refusable depending on the amount. Pets can even challenge a Guild member because even they can't refuse the proposal.

It is said to be the only advantage of being a pet. Mary took advantage of this right to challenge Yuriko in a Life or Death match , but lost, only increasing her debt further and, consequently, acquiring a life plan of her own. Yumeko's plan was to use that right to challenge Kirari to a match, but she changed her plans and challenged Kaede Manyuda instead. In addition to her pet status being revoked after her victory, she also earned nearly $3 billion, Kaede's estimated life worth and a life plan in her name, which she gave to Itsuki Sumeragi.

Life Plan's[]

I just told you. It's exactly what it says. Everything that it says is just what's gonna happen.

Runa Yomozuki to Mary Saotome about life plans "The Woman Who Became Livestock".

For students with very high debts, as it was with Mary Saotome and Yumeko Jabami, they should pay it back with their own lives from a Life Plan (人じん生せい計けい画かく表ひょう Jinsei Keikakuhyō ): a booklet that was given to these students containing everything that would happen in their lives from the moment they graduated. If that student could pay his debt earlier, the life plan is canceled, but if not, everything written in the booklet would happen in real life; since the student council would use their family connections. However, Mary vehemently protested this insanity; as outside the school, her life was hers to live and not the plaything of the president or council.

Student Council Members[]

Donations are made to the student council, which controls all the gambling.

—Ryota Suzui explains about the school system to Yumeko Jabami in "A Boring Girl".


The Beautification Committee is one of the organizations with the power to arrest.

—Midari Ikishima justifying Yumeko's arrest to Ryota in "Tempting Woman".

Beautification Council (美化委員)[]

An association working under the Student Council, whose role is dealing with problematic individuals. Unlike other students, they are authorized to arrest whoever is causing issues in the school. While they have a main office inside the school, they also own a special basement where students can be interrogated.

The Election Committee (選挙管理委員)[]

An association that works within the Student Guild whose function is to serve as croupiers and manage bets within the school. Its members are known to wear kigurumis over their uniforms.

Traditional Culture Club (伝統文化研究会)[]

Photography Club (写真部)[]

Library Club (図書委員)[]

Classical Music Research Club (クラシック研究会)[]

Full-Bloom Society (善咲会)[]

Traditional Swordfighting Club[]

  • Soutarou Ibuki

Journalism Club (報道倶楽部)[]

Yumemi Yumemite's Fan Club (夢見弖ユメミのファンクラブ)[]

Literature Club (文芸部) / Gambling den[]

Softball Club (ソフトボール部)[]

Manga Research Club (漫画研究会)[]


Hana Class (華組)[]

First year:

Second year:

Third year:

Sazanka Class (山茶花組)[]

First year:

Second year:

Momo Class (桃組)[]

Second year:

Third year:

Kikyo Class (桔梗組)[]

First year:

Second year:

Botan Class (牡丹組)[]

Second year:

Third year:

Kiku Class (菊組)[]

Third year:

Rindou Class (竜胆組)[]

Second year:

Tsubaki Class (椿組)[]

Second year:

Third year:

Sakura Class (楼組)[]

Second year:

Kaori Class (薫組)[]

First year:


  • "Hyakkao" (百花王) means "king of a hundred flowers", which refers to the name of the classes being of various types of flowers.
  • It was noted that the school had pretty much descended into madness with the gambling rule; since the teachers allow the insanity to continue.