A project is working towards the goal of a next-generation laser processing system with high-power blue laser diodes. Since 1960, the latest light source technology has always been used for laser processing. The progress of laser processing technology is closely related to national projects. In Japan, the development of laser processing technology has been carried out from 1977, achieving the world’s top position in carbon dioxide (CO2) laser processing. However, since 2001, activity has not progressed strongly—as a result, in current global laser technology, Japan lags behind Germany and the United States. In Germany, government investment based on national strategy is still active. Under these circumstances, a number of research and development projects in Japan are resurging—among them is the “Development of advanced laser processing with intelligence based on high-brightness and high-efficiency laser technologies (2016-2020)” project. Within the project, development of processing technology with blue laser diodes, together with short-wavelength and short-pulse lasers, has been adopted, with the ultimate goal of a next-generation processing system with kilowatt-class blue las...