5. Definition of 5 key words
1. Information : It is information of news and radio, how to conntact.
2. News :
It will be benefit of our life. to information of around the world.
3. Radio : another way to information of around the world.
4. NHK world : It is the main topic of this.
5. costomer : people that to use NHK world and want to get information.