Denphone has become an official member of the Japan Unified Communications Service Provider Association (JUSA).
 

JUSA is a non-profit organization which, in collaboration with society and under fair competition, aims to improve the lives of the general public through the creation and development of next-generation telecommunications services that leverage the strengths of the telephone network as well as other telecommunications infrastructure spanning the globe.

For further information regarding JUSA, please refer to the following website: https://www.jusa.jp/about-jusa