noun
Nippon Idou Tsushin Corporation; IDO
A former Japanese mobile communications company, commonly referred to as IDO. This is a proper noun and organization name.
日本移動通信株式会社は、かつて携帯電話サービスを提供していた。
Nippon Idou Tsushin Corporation once provided mobile phone services.
The name is composed of 日本 (Japan), 移動 (mobile), 通信 (communication), and 株式会社 (stock company). The exact historical derivation is straightforward from the components.