# OTO Navi - Sound Navigator — Audio Player for JTP Books

> Audio player for Japan Times Publishing books, enabling on-the-go listening. (iPhone/iPad app by The Japan Times Publishing, Ltd..)

- Source: https://appshunter.io/ios/app/oto-navi-sound-navigator/id1490391845 (this page in markdown: same URL + `.md`)
- Developer: [The Japan Times Publishing, Ltd.](https://appshunter.io/developer/1478996338)
- Category: Education, Books
- Price: Free
- Rating: 2.80/5 from 5 App Store ratings · 47 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 30 MB
- Languages: American English, Japanese
- Released: 2019-12-16
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/oto-navi-sound-navigator/id1490391845/reviews.md

## What is OTO Navi?

OTO Navi is an app for listening to audio material provided with books published by The Japan Times Publishing, Ltd. Before, this material was available only through supplementary CDs or MP3 file downloads, but now OTO Navi lets you use your smartphone or tablet to listen to it anywhere, anytime!

●How to use OTO Navi●
It’s three easy steps: 1. Search for the book / 2. Download the audio material / 3. Play it!

1. Search for the book
You can easily search the database for the target book by either entering a keyword (title, author, or ISBN) or scanning the bar code on the book you own. If searching by bar code, scan the upper bar code of the two printed on the book’s back cover.

2. Download the audio material
You can download either the full set of audio material for the book, or just the sections you want. If downloading the full set, you may want to use a WiFi connection.

3. Play it!
OTO Navi offers several handy playback features to aid your studies, including 3-second skipping back/forward and repeating of a single track, a single section, or all sections.

*For more details, instructions, FAQ, please refer to the following link. https://bookclub.japantimes.co.jp/en/book/b491927.html
*Please purchase the corresponding books at bookstores.

## Key features

- Book search by keyword or barcode
- Downloadable audio material
- Selective section downloading
- 3-second skip forward/backward
- Repeat track, section, or all
- Offline playback

## Recent user reviews (10 of 47)

All indexed reviews: https://appshunter.io/ios/app/oto-navi-sound-navigator/id1490391845/reviews.md

### 1/5 — 見出し語のみ聞きたい。もしくは次の見出し語にテンポよく進むようなスキップ機能がほしい

*2026-08-08*

単語帳に本書には4種類の音声が付属しています。と、見出し語(英語)のみも含まれていますが、聞けません。英語のあとすぐ例文がきてしまうし、スキップしたら次の単語にいきません。

### 1/5 — ごみ

*2026-08-01*

なんで2級だけ日→英しかないん？
普通は逆だと思うけど
音声使わせる気無さすぎたろ

### 3/5 — Major issue

*2026-07-20*

It’s very convenient, but a major issue is that the desktop version has a bug whereby the position on the audio file cannot be chosen. I.e. you can’t rewind or fast forward. This is obviously a big problem. Please fix it fast!

### 3/5 — Ok.  Not great for MacOS

*2026-07-15, version 1.1.7*

As others have mentioned, it works better for iOS than MacOS.  Navigation is pointless within a section.  You can’t control or view where you are in the file.  I guess for device users this is ok, but some of us like the old laptop or desktop to actually work on.  Other than that, it’s ok.  Nice to hear good pronunciation to go along with the text book.  Also, the files are generally short, so it’s not too bad.

### 3/5 — 要望が一つあります。

*2026-07-13*

現在の学習モードでは、「英単語 → 日本語訳 → 例文 → 例文の日本語訳」の順番でしか再生・表示できません。
単語を覚える段階では、英単語だけを表示・再生するモードや、「英単語→意味」のみ、「例文なし」「英単語のみ」など、学習内容を自由に切り替えられる機能があると嬉しいです。
単語だけをテンポよく確認したい場面も多いため、表示項目をオン・オフできるようになると、より効率的に学習できると思います。よろしくお願いいたします。

### 1/5 — 勉強出来るかぁ

*2026-07-12*

単語帳つかってますが、これで勉強しろは舐めてる笑

単語だけ、単語と日本語、単語と日本語と英語例文、単語と日本語と例文と例文訳の4パターンはせめて欲しい
単語と日本語と英語例文は意味がわからない、なんでそんな中途半端やねん

あとシャッフル機能も欲しい、星とかお気に入り機能も

これらがなかったら正直アプリを入れる意味はほぼ無い

### 5/5 — なかなかイイです

*2026-07-03*

辛口レビューが多くて不安でしたが、使いやすいです。旺文社のアプリと比べて使いにくいとのレビューもありますが、引けを取らないと思います。

### 3/5 — ダウンロードしてる時バカ重たいです！

*2026-06-26*

ほんとにダウンロード中に重たい。それだけ改善してください😊

### 3/5 — App always forgets where I was

*2026-06-17, version 1.1.7*

It would be helpful if the app wouldn’t lose my place every time I open it. Instead I need to remember where I was, then slowly tap to navigate to the exact audio track I was using, then find my place within that audio track. It’s like the app forgets I’ve ever used it.

### 2/5 — んー

*2026-04-09*

ターゲットの友を見習ってほしい。
単語と例文が続けて流れてくるところがマイナスポイントかな。最初は単語だけ聞きたい。参考書自体はとてもいいのに音で覚えたい自分にとっては残念。
そこらへんの修正お願いします🙇

## Frequently asked questions about OTO Navi

### How do I find the audio for my book in OTO Navi?

You can easily search for your book within OTO Navi by entering keywords like the title, author, or ISBN. Alternatively, you can scan the barcode on the back cover of your book to quickly locate it and its associated audio material.

### Can I download only specific parts of the audio in OTO Navi?

Yes, OTO Navi allows you to download either the entire audio set for a book or just the specific sections you need. This flexibility helps manage storage space, especially if you only require certain chapters or lessons.

### What playback features does OTO Navi offer for studying?

OTO Navi includes several handy playback features to enhance your study experience. You can utilize 3-second skipping forward or backward to quickly review content, and you have the option to repeat a single track, a specific section, or all sections.

### Does OTO Navi work offline?

Once you have downloaded the audio material for your books, OTO Navi allows you to listen to it anywhere, anytime, even without an internet connection. This makes it ideal for studying on the go or in areas with limited connectivity.

### Is OTO Navi available on Android devices?

Based on the provided information, OTO Navi is supported on iPhone, iPad, and iPod devices. It is not explicitly mentioned if it is available for Android smartphones or tablets.

### How often is OTO Navi updated?

The latest version of OTO Navi is 1.1.7, which was last updated on January 9, 2026. While this indicates a recent update, the frequency of future updates is not specified.

### What is the age rating for OTO Navi?

OTO Navi has an age rating of 4+, making it suitable for a wide range of users, including younger learners. This rating suggests that the content and interface are designed to be accessible and appropriate for children and adults alike.

### Does OTO Navi have ads?

No, OTO Navi does not contain advertisements. The app is free to use and does not display any in-app ads, providing an uninterrupted listening experience for users.

## Version history (last 5 releases)

### 1.1.7 — 2026-01-09

・Enhanced Book Search  
    ・Improved matching for text format variations (full-width/half-width, kanji/katakana, etc.)  
    ・Supports multi-keyword AND search  
    
・Fixed an issue where continuous playback did not work correctly on some devices

### 1.1.6 — 2025-11-19

Fixed a minor bug

### 1.1.5 — 2025-10-28

We’ve improved the player UI and added new playback features.  
- Bookmark Feature – Allows resume playback from where the audio was paused.
- Playback Speed options – Added 1.75× and 2×.
- Enhanced “Go back to start” Behavior – If playback is near the beginning, it will skip to the previous track; otherwise, it restarts the current one.
- Shuffle Mode – You can shuffle tracks within your loop.
- Minor bug fixes and improvements.

### 1.1.0 — 2022-04-14

Enabled audio to be controlled from a lock screen.
Fixed a minor bug.

### 1.0.5 — 2022-03-01

Fixed the bug that the sound download button sometimes doesn't work.
Improved the display of the sound downloading progress.

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## More apps by The Japan Times Publishing, Ltd.

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All apps by The Japan Times Publishing, Ltd.: https://appshunter.io/developer/1478996338

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*