In response to the aging and deterioration of its infrastructure systems, Japan has invested in new technological and institutional systems for comprehensive infrastructure asset management. These approaches range from the construction of highly durable structures to the strategic maintenance of existing structures. Human resource development plays a critical role in tackling emerging challenges acrosss all stage of the life cycle, and Japan has been carrying out domestic training programs and education to increase the capability of infrastructure managers and engineers. However, there are limitations to the number of people who can participate in these training programs, so the transfer of acquired knowledge from the participants to their coworkers and organizations becomes important for improving capability on the whole. In this paper, the means by which participants in infrastructure maintenance training programs shared acquired knowledge will be examined through the lens of knowledge management, with a study on the transfer of knowledge by engineers in regional Japanese training programs introduced as an exploratory example.