The Kaisei Academy

What The Kaisei Academy does

The Kaisei Academy (開成中学校・高等学校) is a private boys' secondary school located in Arakawa, Tokyo, Japan, operated by the educational corporation Gakko Hojin Kaisei Gakuen (学校法人開成学園). Founded in 1871, the institution celebrated its 150th anniversary in 2021 and operates a 6-year integrated program covering both middle school (3 years, students aged 12-15) and high school (3 years, students aged 15-18). Total enrollment is approximately 1,800-2,000 students, with about 300 first-year middle school students admitted annually through entrance examinations. The school motto is "The Pen is Mightier Than the Sword" (ペンと剣), and its main campus is at 4-2-4 Nishinippori, Arakawa-ku, Tokyo.

The academic program is structured across eight subject departments: Japanese (国語科), Social Studies (社会科), Mathematics (数学科), Science (理科), Physical Education (保健体育科), English (英語科), Arts (芸術科), and Technology/Home Economics/Informatics (技術・家庭・情報科). The English program features a 6-year curriculum using original textbook materials developed in-house by faculty, with 6 hours of weekly instruction and native speaker conversation classes. The institution supports 90+ clubs and activities, and operates a coastal lodge (Nagano Lodge in Tateyama, Chiba Prefecture) for the swimming school program. Students have won medals at the International Mathematical Olympiad, International Olympiad in Informatics, Chemistry Grand Prix, and Japan Biology Olympiad, among others, and the school's botaoshi (pole-toppling) tradition was profiled by The New York Times.

The business model is tuition-based, with revenue from admission fees, monthly tuition, and facility fees paid by enrolled students' families; the school does not publicly disclose financial figures. Admissions outreach includes school open houses (学園説明会), entrance examination briefings, and special information sessions for overseas residents, supplemented by participation in Tokyo metropolitan private school exhibitions. A strong alumni network contributes to career education through guest lectures from figures such as former Bank of Japan Governor Shirakawa, Nobel Laureate Suzuki Akira, and UN officials. Recent investment includes construction of a new high school building, with students transitioning to the new facilities in April 2026.

Name

The Kaisei Academy

Legal name

学校法人開成学園 (Gakko Hojin Kaisei Gakuen)

Website

https://kaiseigakuen.jp

Company type

Private

Founded year

1871

Operating status

Operating

Headcount range

11–50 employees

Short description

The Kaisei Academy is a 150-year-old private boys' secondary school in Tokyo operating an integrated 6-year middle and high school program for approximately 1,800-2,000 students through tuition-based enrollment, with strong traditions in academics, international olympiad success, and alumni-driven career education.

Ownership category

akta.pro rank

Product category

Private Secondary Education

NAICS

Elementary and Secondary Schools (6111)

SIC

Services-Educational Services (8200)

akta.pro primary industry

International/Global Curriculum Schools (IB, Cambridge, etc.) (EDAJABAG)

Keywords

• Private secondary education
• Boys middle school
• Boys high school
• Integrated junior-senior curriculum
• Tokyo cram school market

Headquarters

HQ city

Arakawa, Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Others

Revenue model

1. Tuition and School Fees: Revenue from tuition fees paid by students' families for middle and high school education. Fee structure includes admission fees, monthly tuition, and facility fees as detailed on the school website under 学費 (school expenses).

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

The Kaisei Academy is a private boys' secondary school that delivers a 6-year integrated junior and senior high school education on a single Arakawa-ku, Tokyo campus, with enrollment of roughly 300 first-year middle school students per year. Its core offering is the structured academic curriculum across eight subject departments (Japanese, social studies, mathematics, science, physical education, English, arts, and technology/home economics/informatics), augmented by 90+ clubs and signature co-curricular programs including the Tateyama swimming school, the Dōkan-yama lecture series, and the boat race with Tsukuba University Affiliated High School.

Product overview

The Kaisei Academy operates as a unified 6-year educational institution providing integrated junior and senior high school education. The institution offers a structured academic curriculum across multiple subject departments (国語科, 社会科, 数学科, 理科, 保健体育科, 英語科, 芸術科, 技術・家庭・情報科), supplemented by distinctive co-curricular programs including the 水泳学校 (swimming school at their coastal lodge), 道灌山白熱教室 (special lecture series), and the traditional ボートレース (rowing competition with Tsukuba University Affiliated High School). The English program features original textbook materials developed by faculty, with 6 hours of weekly instruction and native speaker conversation classes.

Differentiator

Problem solved

Functional benefit

Products and services

• Junior and Senior High School Education (中等教育課程) A 6-year integrated educational program covering both junior high (中学校) and senior high (高等学校) education, with a structured curriculum across eight subject departments: Japanese (国語科), social studies (社会科), mathematics (数学科), science (理科), physical education (保健体育科), English (英語科), arts (芸術科), and technology/home economics/informatics (技術・家庭・情報科). Designed for boys aged 12-18 and aimed at preparing them for top-tier Japanese university entrance.
• English Department Program (英語科教育) Comprehensive English language education featuring original faculty-authored textbook booklets, 6 hours of English instruction per week, native-speaker conversation classes, and a 6-year structured progression from foundational grammar in middle school to practical application in high school. Targeted at enrolled boys and aligned with the academy's university-preparation goals.
• Swimming School (水泳学校) A 2-night, 3-day residential swimming program held at the school's Nagano Lodge in Tateyama, Chiba Prefecture, in which first-year middle school students learn sea swimming, traditional Japanese swimming styles, and marine safety under the guidance of swimming club alumni. Aimed at incoming middle school students as a foundational co-curricular experience.
• Dōkan-yama White-Hot Classroom (道灌山白熱教室) Special lecture series organized by the middle school student council, featuring teachers, alumni, and external speakers sharing expertise in their specialized fields. Open to enrolled middle school students as an enrichment program beyond the standard curriculum.
• Boat Race (ボートレース) Annual rowing competition between Kaisei Academy and Tsukuba University Affiliated High School, with approximately 90 matches of history. Open to rowing club students and serving as a flagship athletic tradition of the school.

Quantifiable outcome

• Multiple International Math and Science Olympiad medals annually
• +1 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Seven partnerships are on record, tiered minor and core.

• French Government Study Abroad DivisionminorStrategic or Co-development Partner · 5 November 2015Collaboration with the French Government Study Abroad Division for Kaisei College Fair, featuring French cultural and educational programs.
• Former Bank of Japan Governor Shirakawa (白川方明)minorStrategic or Co-development PartnerFormer Bank of Japan Governor gave a lecture at the 145th school festival on economics and international affairs.
• Nobel Laureate Suzuki Akira (鈴木章)minorStrategic or Co-development PartnerNobel Prize in Chemistry winner (2010) gave a lecture during 'Chemistry Day' event at the school.
• Fukui Prefectural Koshi High School (福井県立高志高校)minorStrategic or Co-development PartnerStudent exchange program between the two schools including joint dinosaur fossil excavation visits in Fukui Prefecture.
• UN Office of the High Commissioner for Human Rights (国連人権高等弁務官事務所)minorStrategic or Co-development PartnerUNHCHR staff member (Kaisei graduate) gave lecture on international affairs and career guidance.
• Bank of JapanminorStrategic or Co-development PartnerBank of Japan Branch, Arakawa-ku - provided facilities for student education activities.
• Nakamura Kazuyuki (柳沢校長)coreOthersPrincipal of Kaisei Academy, serves as school administrator and educational leader.

Scale indicators4 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• Musashi High School: Prestigious Tokyo private boys' junior/senior high school with strong academic reputation and rigorous university-prep curriculum. Closely comparable in cohort quality, curriculum depth, and selective admissions profile.
• Azabu High School: Historic Tokyo private boys' secondary school (founded 1885) with strong academic reputation. Targets the same high-achieving Tokyo applicant pool as Kaisei with similar emphasis on university preparation.
• Hibiya High School (Tokyo Metropolitan): Top-tier Tokyo public high school consistently placing students in elite universities. While public (not private), it competes directly with Kaisei for the highest-performing Tokyo students based on academic reputation.
• Rikkyo Ikebukuro High School: Prestigious Tokyo private boys' high school affiliated with Rikkyo University, with strong academic reputation and active alumni network. Competes for the same selective boys' secondary applicant pool in central Tokyo.
• Waseda Jitsugyo Gakuen: Prestigious Tokyo private boys' junior/senior high school with elite university placement record and strong athletic traditions. Operates in the same selective boys' secondary market as Kaisei, competing for the same high-achieving Tokyo families.
• Nada Senior High School (Hyogo): Elite Kobe-based private boys' senior high school consistently ranked at the top for university-entrance results. Comparable to Kaisei on academic intensity, single-gender focus, and strong Olympiad-track outcomes, though regional rather than Tokyo-based.
• Seijyo Gakuin: Long-established Tokyo private co-educational school with strong academic reputation and university-entrance outcomes. Comparable to Kaisei in tradition, selectivity, and the broader Tokyo premium private school market.
• Keio Gijuku (Keio Academy): One of Japan's oldest and most prestigious private boys' secondary schools with deep academic traditions and an extensive alumni network. Directly comparable to Kaisei in mission (elite boys' secondary education), selectivity, and historical pedigree dating back to the 19th century.
• Gakushuin Boys' Senior High School: Historic Tokyo private boys' secondary school with strong academic reputation and prestigious alumni network (including members of the former Imperial family). Closely comparable to Kaisei in pedigree and selectivity.

Regional players

• Tokyo Metropolitan Tōhō High School: Top-tier Tokyo public high school with strong academic reputation focused on science and mathematics. Comparable to Kaisei's academic intensity profile, particularly in Olympiad-track disciplines, though public-sector in structure.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/kaisei-gakuen

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about The Kaisei Academy