With the spread of the Internet, many users are gathering information on medical institutions through the Internet. For websites of medical institutions involved in emergencies, usability and other aspects are essential. In addition, medical institution websites are likely to be used by all users. Therefore, this study focuses on websites of emergency medical services in Japan, especially in Hokkaido, because there are few previous studies on websites of emergency medical services in Japan. Against this background, this study aims to clarify the status and characteristics of emergency medical service websites in Hokkaido. There are two emergency medical service websites in four cities in Hokkaido, Sapporo, Asahikawa, Hakodate, and Obihiro, operated by “cities” and “medical associations. Therefore, the purpose of this study was to objectively evaluate the websites of four cities of emergency medical services in Hokkaido and visualize issues that need to be improved. Four city emergency medical services’ websites were analyzed using an evaluation tool based on the ‘miChecker’ method. The ‘miChecker’ is an accessibility evaluation tool. There are two main evaluation items. The first is “voice usability evaluation. Voice usability evaluation consists of four items: “Perceivability,” “Operability,” “Understandability,” and “Robustness. The second is a “low vision review. The color scheme and font size are evaluated for low vision in the low-vision review. In addition, as evaluation results common to both voice usability and low vision, four items are output: “Problem,” “ Possibility of problem,” “Judgment required,” and “Manual confirmation.” As a result, it was found that the city's website had, on average, higher scores than the medical association's website in the voice usability evaluation. The low-vision review found several problems with the Sapporo website.