Over 380,000 Downloads and Huge Response: "Sounds That Make Babies Sleep Instantly" Produced by Chiba Institute of Auditory Science Now Available for Free on audiobook.jp

OTOBANK Co., Ltd. (Headquarters: Bunkyo-ku, Tokyo; President and CEO: Yuya Kubota), which operates audiobook.jp, Japan's largest audiobook distribution service, is now offering the lullaby music "Sounds That Make Babies Sleep Instantly," created by the General Incorporated Association Chiba Institute of Auditory Science (Chiba City) and which has received a significant response, for free within the audiobook.jp app.

By utilizing this app, users can enjoy background playback and ad-free listening, further supporting the environment for putting babies to sleep.

Background of Distribution

"Sounds That Make Babies Sleep Instantly," produced by the General Incorporated Association Chiba Institute of Auditory Science (Chiba City), has garnered a huge response, with cumulative downloads exceeding 385,000 in approximately one month since its release, and over 15,000 comments, emails, and phone inquiries received.

While the lullaby music was originally scheduled to be available on the Chiba Institute of Auditory Science website only until the end of June 2026, its free distribution on audiobook.jp has been decided through the cooperation of the Chiba Institute of Auditory Science to continue providing it in an easy-to-use format for those struggling with putting their babies to sleep beyond July. The free distribution audio source can be used not only for putting babies to sleep at home but also for playing simultaneously over school intercoms during nap times at nursery schools. Furthermore, it can be tried as a sleep aid for all generations, not just children.

Benefits of the audiobook.jp App

"Background Playback" allowing listening with the screen off

Playback continues even when the smartphone screen is dark, eliminating the worry of the screen light waking the baby.

"Ad-Free" playback that does not interrupt sleep

No advertisements are played during or at the end of playback, preventing the baby from being startled just as they are falling asleep.

About the Distributed Music

Three songs produced by the Chiba Institute of Auditory Science (Chiba City) for a program segment will be distributed.

"Sounds That Make Babies Sleep Instantly" Development: Lullaby Music 1 (Composed for this project; not used in broadcast)

"Sounds That Make Babies Sleep Instantly" Development: Lullaby Music 2 (Composed for this project; not used in broadcast)

"Sounds That Make Babies Sleep Instantly" Development: Lullaby Music 3 (Used in broadcast)

【Important】Notes on Effective Volume Settings

A faint noise is interwoven into the background of the lullaby music. The "volume fluctuation" of this noise reproduces the average speed and amplitude of "Mom and Dad's breathing." Therefore, please set the volume so that this noise is at a similar level to the actual "breathing" of the parents. Please be aware that if the volume is too high, the baby may be startled.

Music Credits and Usage Precautions

The copyright for this music belongs to the General Incorporated Association Chiba Institute of Auditory Science (Chiba City).

Copyright: General Incorporated Association Chiba Institute of Auditory Science (Chiba City)

Composition: Shinsuke Shibuya, Chief Researcher of Musicology, General Incorporated Association Chiba Institute of Auditory Science (Chiba City)

*Effectiveness is not guaranteed for all babies.

*Resale of downloaded content is prohibited. For any use of the music for profit, whether by individuals or corporations, please consult in advance via the inquiry form of the General Incorporated Association Chiba Institute of Auditory Science.

*Only the three lullaby songs, including the one featured in the broadcast, will be available for free distribution. For paid audio content distributed on audiobook.jp, please limit its use to personal purposes.

How to Listen to the Free Distribution Audio Source

1 Download the audiobook.jp app

・Google Play https://play.google.com/store/apps/details?id=jp.audiobook.app&hl=ja

・Apple Store https://apps.apple.com/jp/app/id1357581573

2 Register as a member of audiobook.jp

3 Search for "Lullaby Music" within the app

4 The audio sources 1-3 will be displayed. Tap "Purchase for C0" (purchase with 0 coins) to buy.

*No coin purchase is necessary as it can be bought with 0 coins.

5 Press the play button to start playback.

*You can also purchase and use it for free from the audiobook.jp website. Please note that credit card registration is required for purchase on the website.

▼ Click here for the special page for "Sounds That Make Babies Sleep Instantly"

http://special.audiobook.jp/sleep_musicbox

Comment from Mutsumi Muraoka, Representative Director of the General Incorporated Association Chiba Institute of Auditory Science

At the Chiba Institute of Auditory Science, through our work in appraising audio and visual materials, we have encountered parents overwhelmed by childcare and tragic incidents involving children's lives. Based on these experiences, we considered how to protect children's lives and concluded that if we could help parents rest even a little, by enabling babies to sleep as quickly as possible, we could achieve that. Thus, we created this lullaby. Immediately after its release, we received an overwhelming response not only from Japan but also from overseas. To ensure more people can benefit from it more stably, we decided to partner with audiobook.jp.

Following the Huge Response, Longer Versions of "Sounds That Make Babies Sleep Instantly" Also Available for Paid Distribution!

Among the responses to the lullaby music released on the Chiba Institute of Auditory Science website, many requests were received for longer and more varied musical compositions. In response to these numerous requests, the Chiba Institute of Auditory Science will proceed with the creation of new music that can be used for "putting babies to sleep."

The newly produced music will be available for paid distribution on audiobook.jp as individual purchases and through the all-you-can-listen plan. We hope you will utilize these new songs according to your child's preferences and the time it takes for them to fall asleep.

Newly Produced "Sounds That Make Babies Sleep" Lullaby Music

*All available for paid distribution on audiobook.jp

・Work Titles:

"Sounds That Make Babies Sleep Instantly" Development: Lullaby Music 1 Long Version

"Sounds That Make Babies Sleep Instantly" Development: Lullaby Music 2 Long Version

"Sounds That Make Babies Sleep Instantly" Development: Lullaby Music 3 Long Version

American Folk-Style Lullaby Music 1

Arabic Folk-Style Lullaby Music 1

Children's Song-Style Lullaby Music 1

Children's Song-Style Lullaby Music 2

Classical-Style Lullaby Music 1

Pop-Style Lullaby Music 1

Pop-Style Lullaby Music 2

Okinawan-Style Lullaby Music 1

・Individual Purchase Price: Long Versions - 550 yen (tax included), Other than Long Versions - 220 yen (tax included)

・Distribution Format: Available for individual purchase, as well as in the audiobook.jp all-you-can-listen plan for 1,330 yen (tax included) per month.

・Other:

All free and paid music can be used within the audiobook.jp app.

Please install the app and search for "Lullaby Music" to use.

▼ Download the audiobook.jp app here

・Google Play https://play.google.com/store/apps/details?id=jp.audiobook.app&hl=ja

・Apple Store https://apps.apple.com/jp/app/id1357581573

Other Audiobooks to Support Sleep Training

On audiobook.jp, we also offer audiobooks for parents struggling with night crying and sleep training, such as the scientifically evidenced sleep guide book "The Sleep Book for Moms and Babies: A Guide to Solving Night Crying, Sleep Training, and Early Morning Waking" (Author: Ayaha Bun, Supervisor: Seiji Nishino, Published by Kodansha).

・"The Sleep Book for Moms and Babies: A Guide to Solving Night Crying, Sleep Training, and Early Morning Waking" (Author: Ayaha Bun, Published by Kodansha)

https://audiobook.jp/product/274851

・"Oyumi Bookstore Mimimin"

https://audiobook.jp/audiobook/270486

What is an Audiobook?

An audiobook is a "listening book" where a narrator or voice actor reads a book aloud. Since you can enjoy reading with your ears alone, it allows for "while-doing" reading in various life scenes, such as while running, commuting by train or car, or doing housework, as well as for those who find it difficult to read text.

In recent years, with the rapid improvement of the environment for using audio content due to the spread of smartphones and wireless earphones, and the introduction of subscription plans offering unlimited listening to various works for a fixed fee, the number of audiobook users has surged. Currently, audiobooks are spreading as the third type of book, following paper and e-books.

[Reference] "Easy to Understand! Audiobooks" - Learn about the audiobook production process and recommended titles! https://bit.ly/3Xg8mFJ

audiobook.jp

audiobook.jp is Japan's largest audiobook distribution service, formerly known as "FeBe" since its launch in 2007. It distributes audio versions of works in various genres, including novels, business books, educational books, language learning materials, and children's books, expanding the reading experience to enjoy books regardless of busyness or environment. In February 2024, the number of members exceeded 3 million. https://audiobook.jp/

<Inquiries regarding audiobook.jp Corporate Edition>

○Inquiry Form: https://audiobook.satori.site/contact

○Special Site for "audiobook.jp Corporate Edition": https://business.audiobook.jp/

OTOBANK Co., Ltd. (Headquarters: Bunkyo-ku, Tokyo; President and CEO: Yuya Kubota)

Founded in 2004 with the slogan "Creating a Culture of Listening," OTOBANK is an audio platform company. It operates audiobook.jp, Japan's largest audiobook distribution service, producing and distributing tens of thousands of audiobooks. The company's origin stems from founder Ueda's grandfather's experience with glaucoma, inspiring a desire to create a world where reading could be enjoyed through listening. Currently, OTOBANK also plans and produces podcasts to enhance corporate brand value and offers audio services for corporations to support human resource development. Through promoting reading accessibility and proposing a new lifestyle of "ear-based activities" (mimikatsu), the company aims to realize a richer society created by sound.

https://www.otobank.co.jp/