Developing educational and testing material stretches the imagination and exercises every writing muscle. Careful attention must be paid to each detail, as a single mistake can discourage the learner. To keep things interesting, the content must be diverse in terms of context. It must also be clear, concise and consistent. And it has to match the learner's capabilities while at the same time enabling them to advance.

I started writing educational material for students and teachers in the 1990s. Around that time I contributed to a series of textbooks for schools in Tokyo, Japan and assisted in developing a curriculum for the Peace Boat. While most of the educational content I write these days is for TOEIC preparation guides, I also work on Eiken test and other material.

You can check out my publications and other projects I've worked on below.

​Authors: Masaya Kanzaki and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: April 7, 2020

​Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: December 20, 2019

​Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: August 20, 2019

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: June 20, 2019

TOEIC L&R TEST 初心者特急 パート4

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: April 20, 2018

TOEIC L&R TEST 初心者特急 パート3

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: April 20, 2018

TOEIC L & R TEST 読解特急2 スピード強化編

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: February 7, 2018

TOEIC L & R TEST 読解特急5 ダブルパッセージ編

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: February 7, 2018

TOEIC L&R TEST 初心者特急 パート1・2

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: December 20, 2017

TOEIC L&R TEST パート3・4特急II

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: September 20, 2017

ミニ模試トリプル10 TOEIC® L&R テスト

Authors: Tetsuya Morita and Daniel Warriner

Publisher: 3A Corporation

Released: June 23, 2017

1駅1題 TOEIC L&R TEST 読解特急

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: May 30, 2017

TOEIC L&R TEST 標準模試2

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: Yadokari Publishing Inc.

Released: March 17, 2017

TOEIC LISTENING AND READING TEST 標準模試1

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: Yadokari Publishing Inc.

Released: November 11, 2016

TOEIC TEST 新形式模試 はじめての挑戦

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: Yadokari Publishing Inc.

Released: May 28, 2016

新形式問題対応 改訂版 世界一わかりやすい TOEICテストの授業 (Part 7 読解)

Author: Masao Seki (English content written by Daniel Warriner)

Publisher: KADOKAWA

Released: April 27, 2016

新形式問題対応 改訂版 世界一わかりやすいTOEICテストの授業 (Part 5 & 6 文法)

Author: Masao Seki (English content written by Daniel Warriner)

Publisher: KADOKAWA

Released: April 14, 2016

新形式問題対応 改訂版 CD2枚付 世界一わかりやすい TOEICテストの授業 (Part 1‐4 リスニング)

Author: Masao Seki (English content written by Daniel Warriner)

Publisher: KADOKAWA

Released: April 14, 2016

新TOEIC TEST パート5 特急 400問ドリル

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: March 6, 2015

神崎正哉の はじめての新TOEIC TEST完全総合対策:解説DVD付

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: October 23, 2015

新TOEIC TEST 初心者特急 読解編

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: September 19, 2014

新TOEIC TEST ドリーム特急 全パート実戦対策

Authors: Tetsuya Morita, Tetsuya Hanada, Masaya Kanzaki, Yu Kato, Junnosuke Hamasaki, TEX Kato, and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: April 8, 2014

新TOEIC TEST 読解特急 5 ダブルパッセージ編

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: September 6, 2013

新TOEIC TEST パート3・4特急II 出る問 総仕上げ

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: April 19, 2013

新TOEIC TESTそっくり問題で極めるリスニング・トレーニング

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: October 25, 2012

新TOEIC TEST 単語特急3 頻出語言い換え集

Authors: Tetsuya Morita and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: October 19, 2012

新TOEIC TEST読解特急4ビジネス文書編

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: September 7, 2012

神崎正哉のはじめての新TOEIC TEST完全総合対策

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: May 23, 2012

新TOEIC TEST パート3・4 特急実力養成ドリル

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: May 18, 2012

CD付 神崎正哉の新TOEIC TEST ぜったいリスニング

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: December 19, 2011

新TOEIC TEST読解特急3 上級編

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: September 7, 2011

究極のTOEICテスト トレーニング

Authors: Jun Suzuki,‎ Koji Hayakawa,‎ and Daniel Warriner

Publisher: CosmoPier Publishing Company, Inc.

Released: June 27, 2011

日本事情―政治・外交・社会編 The Politics, Diplomacy Issues and Society of Japan

Authors: Yoji Yamakuse‎ and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: May 25, 2011

10分×10回×10日間 TOEIC TEST ミニ模試トリプル10

Authors: Tetsuya Morita and Daniel Warriner

Publisher: 3A Corporation

Released: May 21, 2011

新TOEIC TEST模試特急 200問一本勝負

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: May 6, 2011

日本事情―地理・人・言語編 The Geography, People and Language of Japan

Authors: Yoji Yamakuse‎ and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: February 25, 2011

日本事情―歴史・宗教・プライド編 The History, Religion and Pride of Japan

Authors: Yoji Yamakuse‎ and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: February 25, 2011

新TOEIC TEST 読解特急2 スピード強化編

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: September 17, 2010

新TOEIC TEST 総合模試特急 はじめてでもまるごと完成 (CD付き)

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: April 7, 2010

どうしても英語で伝えたい日本の事情100

Authors: Yoji Yamakuse‎ and Daniel Warriner

Publisher: IBC Publishing, Inc.

Released: December 25, 2009

1駅1題 新TOEIC TEST読解特急

Authors: Masaya Kanzaki,‎ TEX Kato,‎ and Daniel Warriner

Publisher: Asahi Shimbun Publications Inc.

Released: October 7, 2009

新TOEIC TEST神崎式200点アップ術(上)

Authors: Masaya Kanzaki‎ and Daniel Warriner

Publisher: GOKEN Co., Ltd.

Released: May 26, 2009

新TOEIC TEST神崎式200点アップ術(下)

Authors: Masaya Kanzaki and Daniel Warriner

Publisher: GOKEN Co., Ltd.

Released: May 26, 2009