抄録
Burst of information in quantity has brought a paradox that people have more difficulties to find out necessary information. For the solution, many studies on the information retrieval have been conducted and not a few tools for searching have been developed. But many have experiences that they could hardly pin-point particular information they required. This paper, however, does not propose a new retrieval technologiy. We have observed that most of non-specialists, particularly Japanese are not well-aware of their problems they want to solve, more precisely, they can not fully define what they want to know. It will be useful if databases are provided with a structure quite different from the exisitng ones searched by use of key words. We called the new type database as "question-clusters-based database".
