User interface concepts for post ubiquitous computing

Progress of ubiquitous computing oriented ICT promotes development of information appliances with various functions. In spite of the progress, most of user cannot receive the benefit of them. In this paper as the reason of it, the problems related to increasing enormous amount of information contents were discussed. Based on the problems, there are new challenges for designing user experiences; interactions between vast amount of information contents and user, new way of enjoyment with digital contents based on ubiquitous computing, habituating diverse content accesses in daily life. Analyzing these challenges from view of human-centered design could derive new user experiences and user interface concept. However ubiquitous computing projects by human-centered approach are quite a few by comparison with those in USA or EU. Actual installment of the technology requires this approach definitely