Z-kai Inc. (Location: Mishima City, Shizuoka Prefecture, President: Takao Fujii), a group company of Masu-kai Holdings Inc. (Z-kai Group), is pleased to announce that its "Z-kai Books" Sokudoku Eitango series has been newly listed on the Furusato Nozei donation gift website for Mishima City, Shizuoka Prefecture, starting June 26, 2026.

Since 2018, our headquarters has been located in Mishima City, and with the group philosophy of "Opening the Future with the Best Education," we provide a diverse range of educational services, including "Z-kai Correspondence Education," to a wide range of age groups from children to university students and working adults.

In July 2025, we began offering "Grade Up Problem Collection" and "Thinking Skills Expansion Workbook for Elementary School Students" as donation gifts for the city. Now, with the desire to further contribute to regional revitalization and support learners nationwide, we have decided to add the "Sokudoku Eitango" series, which has been supported by learners, including exam students, for many years. Through this initiative, we will continue to provide optimal educational services and materials to as many customers as possible.

Outline of Added Donation Gifts

"Sokudoku Eitango" Series

The "Sokudoku Eitango" series is a vocabulary book that has been supported by many university entrance exam students for many years.

By learning words within English sentences, students acquire "usable" vocabulary skills. With the philosophy of "wanting students to learn English as a tool to logically grasp opinions and matters and express them persuasively," this series, even after more than 30 years since its publication, continues to be revised and has achieved over 9.8 million copies shipped cumulatively, making it an "ever-evolving classic" that receives No. 1 support from exam students.

※ Kinokuniya Bookstore Chain, High School Academic English Vocabulary/Idioms Category, Cumulative Series Sales (Period: January 2000 - April 2026)

Maruzen Junkudo Bookstore Group, University Entrance Exam Reference Book Category, Cumulative Series English Vocabulary/Idioms Sales (Period: January 2015 - April 2026)

View Details of Sokudoku Eitango Series

Navigates to the Z-kai Website

Book Title

Level

Features

Donation Amount

1

Sokudoku Eitango: Junior High School Edition [Revised Edition]

From Junior High School English Review to High School Entrance Exams

A junior high school version of "Sokutan," a vocabulary book learned through stories. Includes approximately 2,300 words essential for high school entrance exams.

6,000 yen

2

Sokudoku Eitango: Introductory Edition [3rd Revised Edition]

From Basic High School English to the Common Test for University Admissions

Includes 1,400 words. Students naturally acquire vocabulary in context through enjoyable English sentences.

6,000 yen

3

Sokudoku Eitango: Essential Edition [8th Revised Edition]

The Definitive Edition for University Entrance Exam Preparation

(From the Common Test for University Admissions to National and Private Universities)

Carefully selected approximately 1,900 essential words covering 95% of words appearing in university entrance exams.

7,000 yen

4

Sokudoku Eitango: Advanced Edition [5th Revised Edition]

Preparation for Secondary Examinations at Competitive National and Private Universities

Carefully selected approximately 1,200 high-level words that will set you apart from others. Also cultivates the ability to "infer unknown words from context."

7,000 yen

5

Sokudoku Eijukugo [Revised Edition]

Essential Idiom Preparation for University Entrance Exams

Thorough analysis of major entrance exams, with a careful selection of approximately 1,080 essential idioms and structures.

6,000 yen

6

English Vocabulary and Idioms Set for High School Students

Sokudoku Eitango (Introductory, Essential, Advanced Editions), Sokudoku Eijukugo Set (Completely Covers University Entrance Exams)

This set completely covers university entrance exams, from the introductory to advanced editions and English idioms.

24,000 yen

Application Start Date

June 26, 2026 (Fri)

Major Furusato Nozei Donation Gift Sites

Applications for donations (contributions) for our relevant donation gifts can be made through the following Furusato Nozei portal sites. (As of June 2026)

※ Only major donation gift sites are listed.

・Furusato Choice

・Rakuten Furusato Nozei

・Furunavi

Inquiries Regarding "Z-kai Books"

Z-kai Inc., Content Business Division, Sales Management Department

TEL: 055-976-8311 (Reception Hours: 9:00 AM - 6:00 PM, excluding Saturdays, Sundays, national holidays, and year-end/New Year holidays)

URL: https://www.zkai.co.jp/books/

FACT BOX

  • Source: PR TIMES
  • Category: 地域振興