Denphone | The Voice, Video & Network Specialists

Japan's Expert IP Telephone and Video System Integrators

The Denphone Team stands behind all IP Phone systems sold.

Denphone provides a wide range of cloud telephony, video conferencing and IT infrastructure solutions.

Our solutions include cloud phone systems, desktop and meeting room video conferencing systems, Japan call termination, telephone help desk outsourcing, CMS integration and more.

Based in Tokyo, we work closely with both Japanese and multinational clients to implement turn-key solutions that meet needs, provide solid returns on investment and increase productivity.

Being partnered with global leaders including Colt, Digium, Polycom, Yealink, Grandstream, and Cisco Systems enables us to provide solutions that fit within your IT program and protect your investment over the long term.

We are Japan's leading provider of open PC based VoIP Telephone PBX solutions.

Contact us today for a free no-obligation quote. To find out how you can save costs and improve your business productivity with the latest communications technology, phone +81-3-4550-1405 (Tokyo), +81-6-4560-3200 (Osaka) or contact us to set up an appointment today.

If you are affected by the Broadsoft PBXL shutdown, please contact us for a competitive alternative. Call us on +81-3-455001405 or email us at

Denphone At A Glance

  • Cloud Telephone Solutions
    Inexpensive VoIP office phone solutions including cloud PBX, phones, and tele-conference equipment .
  • WarpGenie
    NTT VoiceWarp Extension that allows automatic warping of NTT numbers both in Japan and off-shore.
  • Denphone PBX
    Denphone offers a wide range of PBX solutions from small office / SOHO solutions, all the way through to large office phone system solutions.
  • Telecom Support Outsourcing
    Bilingual telephone support including MAC and hardware support, both onsite and offsite.
  • Japan Call Termination
    Japan phone termination as well as (03) Tokyo and (06) DID's. IAX2, SIP etc supported.
  • Voice Prompts
    Professional Japanese and English voice prompt recording for IVR solutions. Free GSM Japanese voice prompts for Asterisk.
  • Video Conferencing Systems
    We supply a wide range of video conferencing systems from Polycom, Cisco and Grandstream as well as Skype integration.
  • Webshop
    For all your telephony needs in Japan including Digium analog and digital cards, Polycom, snom and Cisco phones.
  • Voiceblast
    24 hour global voiceblast service - reach out to your staff and customers by voice message or email.
  • News
    VoIP and Denphone related news from Japan.
  • Case Studies.
  • Hardware
    Lists some of the PBX and telephony hardware that Denphone sells and supports.
  • Resources
    Asterisk and VoIP resources.
  • Hiring
    Telephony related job openings in Japan.
  • Contact
    We will answer your VoIP and Telephony related inquires honestly and quickly.


Denphone is a highly recommended VoIP integrator.

Denphone supplied us with a small phone system for our office here in Tokyo. The great service, low cost and high reliability, as well as the significant savings on our international calling charges makes their service highly recommendable.

Safe Harbour K.K.

We would highly recommend Denphone for any telephone system work in Japan. They successfully implemented PBX system for our new Tokyo branch office, on time and on budget. We were very impressed by the service they gave and the low cost.

CIO, Major American Investment Banking Company



Tel: +81-3-4550-1405 (Tokyo)

Tel: +81-6-4560-3200 (Osaka)

Fax: +81-3-6234-9666

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