EIKOH

What EIKOH does

EIKOH (株式会社栄光, EIKOH INC., branded as 栄光ゼミナール / Eikoh Seminar) is a Tokyo-headquartered private education services company and wholly-owned subsidiary of ZKAI Group (Z会グループ). It operates a multi-brand tutoring platform serving elementary through high school students across Japan, anchored on small-group classroom instruction (approximately 10 students per class) and one-on-two individual tutoring (Bizabi), with a dedicated university entrance examination track (Navio). Beyond core test preparation, the company runs a portfolio of adjacent sub-brands covering elite private school prep (Zkai Ekutasu), Tokyo metropolitan unified junior high prep (E-style), humanities university prep (Masuda Juku), robotics/programming (Robot Academy), science experiments (Science Lab), online nationwide classes (LiNKSTUDY), coworking/self-study spaces (E-Lounge), and career development (Career Route).

The company runs 200+ directly-operated physical classrooms across 9 prefectures — Tokyo (90+ in the 23 wards), Kanagawa, Saitama, Chiba, Tochigi, Ibaraki, Miyagi, Kyoto, and Shizuoka — supported by the CATS@Home student LMS, the i-cot booth-style self-study rooms available at every location, an online question resolution center, and the third-party atama+ AI-powered adaptive learning diagnostic deployed in middle-school math and English. Revenue is generated primarily through recurring monthly tuition subscriptions priced by grade, subject, and region (entrance fee typically 22,000 yen tax-inclusive), supplemented by one-time intensive programs (summer/winter courses, school-specific exam packs). All sales and service delivery are direct-to-consumer with no third-party resellers or franchisees. The company employs 1,001–5,000 staff and was incorporated in 1998 (note: firmographics input lists 1980, suggesting an earlier predecessor or brand origin).

Name

EIKOH

Legal name

株式会社栄光

Website

https://eikoh.co.jp

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

EIKOH (栄光ゼミナール) is a Tokyo-based private tutoring subsidiary of ZKAI Group, operating 200+ classroom locations across 9 Japanese prefectures. It delivers small-group and individual instruction for elementary, middle, and high school students preparing for Japanese entrance examinations, plus university prep under the Navio brand.

Ownership category

akta.pro rank

Product category

Private Tutoring and Exam Preparation Services

NAICS

Exam Preparation and Tutoring (611691), Educational Support Services (611710)

SIC

Services-Educational Services (8200)

akta.pro primary industry

K–12 Core Curriculum Small-Group Tutoring Centers (Math/ELA/Science/Social Studies) (EDANAHAA)

akta.pro secondary industries

K–12 Standardized Assessments & Benchmark Exams Prep (State tests, MAP, ISEE/SSAT) (EDANABAD), Advanced Writing, Literature & Humanities Tutoring (Advanced composition, rhetoric, debate) (EDANAKAG), High School Equivalency (GED/HiSET/TASC) Preparation (EDANAJAG)

Keywords

• Private tutoring services
• Exam preparation
• Individual instruction
• Group classroom tutoring
• University entrance prep

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices13 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Group Tutoring (Eikoh Seminar): Small-group classroom instruction (approximately 10 students per class) for elementary, middle, and high school students covering exam preparation, regular test support, and academic skill development. Billed on a monthly subscription basis.
2. Individual Tutoring (Bizabi): One-to-two (teacher:students) personalized instruction for elementary through university prep students. Offered as a per-session or subscription model, with course packs (e.g., 3-course, 5-course packs for specific schools).
3. University Exam Preparation (Navio): Specialized university entrance exam preparation for high school students including group instruction, exercise-based individual coaching (1 teacher : 4 students), one-on-one tutoring (1:2), and video lecture courses (approx. 600 titles). Billed on monthly subscription.
4. Online Group Classes (LiNKSTUDY): Live interactive online small-group classes (approx. 10 students) for elementary exam preparation, targeting students nationwide who cannot attend physical classrooms.
5. Special Exam Training: Short-term intensive courses including summer/winter intensive programs, special exam-specific training (e.g., school-specific pack courses for 西京中, 洛北中, 市立西京中), and pre-exam crash courses offered as add-on paid programs.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

EIKOH provides small-group classroom tutoring (approximately 10 students per class) and one-on-two individual instruction for elementary through high school students in Japan, covering preparation for private/public junior high school entrance exams, high school entrance exams, and university entrance exams. The company operates more than 200 directly-owned classroom locations across nine prefectures and extends its curriculum nationally through the LiNKSTUDY online platform. Supporting offerings include specialized sub-brands for elite school prep, university humanities prep, science experiments, robotics/programming, career planning, and co-working/study space.

Product overview

EIKOH operates a multi-brand tutoring and education platform consisting of three core service lines: 栄光ゼミナール (small-group exam prep tutoring with approximately 10 students per class), 栄光の個別ビザビ (one-on-two personalized tutoring), and 大学受験ナビオ (university exam preparation with group classes, individual exercises, video lectures, and specialist navigation advising). These are complemented by specialized sub-brands including E-style (Tokyo public unified junior high prep), Z会エクタス (elite private school prep), 増田塾 (humanities-focused university prep), 栄光キャリアルート (career development), サイエンスラボ (science experiments), ロボットアカデミー (robotics/programming), LiNKSTUDY (online dual-interactive classes nationwide), and イーラウンジ (co-working/study spaces). Supporting infrastructure includes CATS@Home (student LMS portal) and i-cot (booth-type self-study rooms at all locations). The platform spans elementary through university preparation, covering private school exams, public unified school exams, high school entrance exams, and university entrance exams, with AI-powered learning tools integrated into tutoring delivery.

Differentiator

Problem solved

Functional benefit

Brands

• 栄光の個別ビザビ: One-to-two individual tutoring service for elementary, middle, and high school students.
• 大学受験ナビオ
• E-style
• LiNKSTUDY
• サイエンスラボ
• ロボットアカデミー
• 栄光キャリアルート
• イーラウンジ
• Z会エクタス
• 増田塾

Products and services

• 栄光ゼミナール (Eikoh Seminar) Flagship small-group tutoring service (approximately 10 students per class) with interactive, two-way instruction for elementary, middle, and high school students preparing for private/Tokyo-metropolitan junior high school entrance exams, public unified junior-senior school exams, and high school/university entrance exams.
• 栄光の個別ビザビ (Eikoh no Kobetsu Bizabi) One-on-two personalized tutoring (one teacher with up to two students per session) for elementary through high school students, offering customized learning plans for exam preparation, regular test prep, weakness remediation, and skill development. Includes 3-course and 5-course packs targeting specific schools.
• 大学受験ナビオ (Daigaku Juken Navio) University entrance exam preparation service for high school students offering small-group interactive classes, exercise-based individual sessions (1 teacher : 4 students), one-on-two tutoring (1:2), a video lecture library (~600 titles), and university-exam specialist Navigation advising. Supports general entrance exams, recommendation-based selection, and integrated/comprehensive selection examinations.
• E-style Specialized brand focused on Tokyo Metropolitan Unified Junior High School (都立中高一貫校) exam preparation. Offers targeted curriculum for students aiming for prestigious unified schools in the Tokyo area.
• Z会エクタス (ZKai Ekutasu) Premium brand targeting top-tier private junior high schools such as Tsukukoma (筑駒), the Three Top Schools (御三家), and Koto (駒東). Specializes in preparing students for elite institutions with advanced curriculum.
• 増田塾 (Masuda Juku) University exam preparation service specializing in humanities/liberal arts programs at top private universities. Focused on rigorous essay writing and analytical skills for competitive university entrance.
• 栄光キャリアルート (Eikoh Career Route) Career development program supporting students from elementary school through university age. Helps students explore career paths and develop long-term academic and professional plans.
• サイエンスラボ (Science Lab) Science experiment classes for children from preschool age through middle school. Hands-on scientific exploration to foster interest in science and build foundational lab skills.
• ロボットアカデミー (Robot Academy) Robotics and programming classes that develop problem-solving skills. Students learn engineering concepts through building and coding robots, fostering computational thinking.
• LiNKSTUDY Online dual-interactive group class service delivering Eikoh Seminar's elementary exam preparation curriculum to students nationwide via the internet. Students participate in real-time interactive sessions with peers across the country, taught by expert instructors specializing in Tokyo-area junior high school entrance exams.
• E-Lounge (イーラウンジ) Co-working space and study room service for remote workers and students. Provides a professional environment for focused work and self-study with facilities for both work and academic pursuits.

Quantifiable outcome

• Eikoh Seminar 仙台校 achieved 77.8% pass rate for 仙台二華中 (vs. general rate of 27.4%)
• +4 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature5 records

Partnerships

One partnership is on record.

• Zkai Group (株式会社Ｚ会 / Ｚ会グループ)coreOthersEIKOH INC. (株式会社栄光) is affiliated with Zkai Group. The company shares the Zkai Group logo on its website footer and references Zkai Group in privacy documentation. Eikoh Seminar and related brands operate as part of the Zkai Group education ecosystem. Joint personal information utilization is documented between EIKOH and Zkai Group companies. Zkai Group company details are referenced at zkai-gr.co.jp.

Scale indicators5 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Sapix (サピックス): Sapix is Japan's dominant elite junior high school entrance exam preparation chain, with a strong Tokyo-area classroom network and a published passing results reputation. It is the principal direct competitor for Eikoh Seminar's elementary exam prep track and shares the small-group, high-accountability teaching approach.
• Meiko Gijuku (明光義塾): Meiko Gijuku is Japan's largest individual tutoring franchise chain, with thousands of classrooms nationwide. It directly competes with Eikoh's Bizabi individual tutoring service and has a comparable K-12 student targeting strategy, operating on a similar subscription-based model.
• Sundai (駿台): Sundai is a major university entrance exam preparation chain with classrooms across Japan, particularly strong in Tokyo and Kanto. It competes directly with Eikoh's Navio service for high school students preparing for top-tier university entrance examinations.
• Waseda Juku (早稲田アカデミー): Waseda Juku is one of the largest K-12 and university prep cram school chains in Japan, offering group classroom instruction across Tokyo, Kanto, and other regions. It directly competes with Eikoh Seminar in junior high, high school, and university entrance exam preparation, with a comparable multi-format service model and neighborhood classroom strategy.
• Kawaijuku (河合塾): Kawaijuku is one of Japan's largest university entrance exam preparation chains, with national classroom coverage and a strong brand in high school student recruitment. It directly competes with Eikoh's Navio and university prep tracks, particularly for high-achieving high school students.
• Toshin (東進): Toshin is a major university prep chain known for its video lecture platform and satellite classrooms. It competes with Eikoh's Navio track for high school students, particularly via video-based content delivery, similar to Eikoh's Navio video lecture library.
• Nichinoken (日能研): Nichinoken is a leading nationwide junior high school entrance exam preparation chain with a strong presence in the Kanto region. It directly competes with Eikoh Seminar for elementary students preparing for private and public combined school entrance exams, using a similar small-group classroom model.
• Yotsuya Otsuka (四谷大塚): Yotsuya Otsuka is a premier junior high school entrance exam preparation chain with a strong brand and a network of affiliated regional schools. It competes directly with Eikoh Seminar's Zkai Ekutasu and Eikoh Seminar group tracks for top-tier private school candidates.

Regional players

• Hama Gakuen (浜学園): Hama Gakuen is a major K-12 cram school chain based in the Kansai region (Osaka, Kobe, Kyoto), with strong results in elite junior high school entrance exams. While it operates primarily in western Japan, it is comparable to Eikoh Seminar's Zkai Ekutasu and group instruction segments in model and competitor set.

Broad incumbents

• Benesse (ベネッセコーポレーション): Benesse is a major Japanese educational services conglomerate offering correspondence education, publishing, and digital learning. As a broader incumbent with overlapping capabilities in K-12 and study content, it competes indirectly with Eikoh across multiple sub-brands and through its own juku subsidiaries.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries10 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 EIKOH