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| Aiphone Co., Ltd.
Maker of communication systems for business and homes.
| Dwango Co., Ltd.
Creating platforms for network entertainment including mobile phone games and ring tones.
| e-System Corporation
Provides CRM consulting, wireless services, travel navigation systems, seminars, and realted training.
| Hikari Tsushin Inc.
Active in mobile communications, products and services for the corporate market, insurance service, mobile media and internet and venture capital.
| Infocom Corporation
Provides integrated telecommunications services, consulting on telecommunications systems, telecom hardware, software, sales, and data processing services.
| ITX Corporation
Active in mobile and other communications, network services, satellite/cable TV broadcasting and content, electronics and life sciences.
| Japan Communications Inc.
Corporate wireless service provider, mobile productivity and enterprise access solutions, business MVNO.
| Japan Handy Phone
Inexpensive Japan nationwide cell phone rental service.
| Japan Telecom ITJ
Japanese international telephone service company for both consumers and business.
Allows phone users to choose from a variety of Japanese telecoms for the cheapest toll rates. One time registration fee required.
| Rentafone Japan
Convenient cell phone rental for visitors to Japan.
Information about one of Japan's largest telecom engineering service providers.
Offers Japanese cellular phone and wireless mobile data cards. Based in Tokyo.
| Telecommunications Carriers Association (TCA)
Aims to contribute to more convenient telecommunications for Japanese and to the healthy development of the information and communications industry. With organization guide, operations, and links.
Offering international callback and internet telephony services.
| World Link Japan J-Call
Offers a discounted direct dial international and domestic telecom service from fixed and cellular lines to residents of Japan.