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IIJ to Launch iPhone Application for High-Res Streaming Service "PrimeSeat"

Free Application for iPhone Users to Easily Enjoy High-Res Audio

June 14, 2018

TOKYO-June 14, 2018-Internet Initiative Japan Inc. (IIJ, NASDAQ: IIJI, TSE1: 3774), one of Japan's leading Internet access and comprehensive network solutions providers, today announced that the application for its high-res streaming service "PrimeSeat" is now supported on iOS platforms. Jointly developed with Korg Inc., the free app for listening to PrimeSeat on iPhone devices launched in Apple's App Store on June 13, 2018.

PrimeSeat offers original programs, concerts, and a variety of other content, which is available via live-streaming, on-demand, and Internet radio. This streaming service was only compatible with PCs (Windows/Mac), but with this iPhone app, users can easily listen to their favorite content via smartphone in the way that best suits their lifestyle.

PrimeSeat iOS Version Outline

Application Specifications

Application name PrimeSeat
Pricing Free
OS compatibility iOS 9.3 or later
Available languages English, Japanese
Compatible devices(*) iPhone X, iPhone 8 Plus, iPhone 8, iPhone 7 Plus, iPhone 7, iPhone 6s Plus, iPhone 6s, iPhone SE, iPhone 6 Plus, iPhone 6, iPhone 5s, and sixth-generation iPod touch
Application icon
  • (*) The available DSD formats differ by device.



The variety of available on-demand content includes the Geidai Music Archive of recorded performances held at the Tokyo University of the Arts; Jazz Live from jazz clubs; and the Hi-Res Roman Club, King Records' high-res collection of masterpiece animation and SFX records and CDs.

Live streaming

Broadcasts of various live performances and concerts.
IIJ regularly streams live performances of the Berlin Philharmonic in DSD 11.2 MHz high-resolution audio, and the next performance is Thursday, June 21, 2018, at 3:00 a.m. JST. During this last concert featuring Principal Conductor Simon Rattle, listeners can enjoy, in real time, Mahler's Symphony No. 6. The recording of the performance will be available from Monday, June 25, to Sunday, July 1, 2018.

  • (*) This livestreaming service is only provided within Japan.


The available Internet radio programs include classical music Internet radio station OTTAVA and the Berlin Phil Hour, a program that offers regular performances of the Berlin Philharmonic in high-res audio (PCM 48 kHz/24 bit).

  • (*) The paid contents are not available for listening on iOS version.


How to Listen/Playback Environment

Users can listen just by installing the PrimeSeat iOS app. PrimeSeat offers high-resolution audio in a wide range of formats, up to DSD 11.2 MHz/1 bit. However, when played on iPhone devices, the audio is converted to either 48 kHz or 44.1 kHz audio. Users can listen to even higher quality high-resolution audio by connecting the iPhone to a USB D/A converter (USBDAC)(*).

  • (*)PCM formatted audio is compatible with native playback at up to 192 kHz, while DSD formatted audio is compatible with native playback at up to 11.2 MHz. High-quality high-resolution audio playback requires large volumes of data communications, so IIJ recommends that users listen via Wi-Fi networks.

Install PrimeSeat for iOS here(App Store)

IIJ aims to continue providing services to satisfy its customers.

About IIJ

Founded in 1992, IIJ is one of Japan's leading Internet-access and comprehensive network solutions providers. IIJ and its group companies provide total network solutions that mainly cater to high-end corporate customers. IIJ's services include high-quality Internet connectivity services, systems integration, cloud computing services, security services and mobile services. Moreover, IIJ has built one of the largest Internet backbone networks in Japan that is connected to the United States, the United Kingdom and Asia. IIJ was listed on the U.S. NASDAQ Stock Market in 1999 and on the First Section of the Tokyo Stock Exchange in 2006.

The statements within this release contain forward-looking statements about our future plans that involve risk and uncertainty. These statements may differ materially from actual future events or results. Readers are referred to the documents furnished by Internet Initiative Japan Inc. with the SEC, specifically the most recent reports on Forms 20-F and 6-K, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements.

For inquiries, contact

IIJ Corporate Communications

  • (*) All company names and service names used in this press release are the trademarks or registered trademarks of their respective owners.

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