OTO Navi is an app developed by The Japan Times Publishing Ltd. that allows users to listen to audio material provided with books published by the company. Previously, this material was only accessible through supplementary CDs or MP3 file downloads, but now OTO Navi provides the convenience of using your smartphone or tablet to listen to it anytime and anywhere.

Using OTO Navi is simple and straightforward. The app can be used in three easy steps. First, users can search for the desired book by entering a keyword such as the title, author, or ISBN, or by scanning the bar code or QR code on the book. When scanning the bar code, it is important to scan the upper bar code on the book's back cover.

Once the book is located, users can proceed to download the audio material. The app allows users to download either the full set of audio material for the book or select specific sections. For those downloading the full set, it is recommended to use a WiFi connection for faster and smoother downloads.

Once the audio material is downloaded, users can start playing it using OTO Navi's user-friendly interface. The app offers various playback features to enhance the study experience, including the ability to skip back or forward by 3 seconds and the option to repeat a single track, a single section, or all sections.

With OTO Navi, listening to audio material has never been easier. The app provides a convenient and portable solution for accessing audio content that complements the books published by The Japan Times Publishing Ltd.