policies and measures on telecommunication through investigating actual utilisation of ICT from the users' point of view and the status of communication networks in enterprises and their use of ICT. It is composed of the household survey and the enterprise survey. The household survey is conducted by mailing method at households randomly chosen by the two-stage stratified sampling method taking prefecture and city size into account from those in which the head is 20 years old or over as of 1 April of the survey year. The enterprise survey is conducted at enterprises randomly chosen by the systematic sampling by industry, stratified according to the size of regular employees from those with 100 or more employees. Radio stations Radio stations refer to the wireless telegraphs, wireless telephones and other electric facilities for transmitting and receiving radio waves together with the persons who operate these facilities. Radio use has been increasing and diversifying in step with socio-economic developments and progress in information technology. 12 Information and Communication 323
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