This paper examines the role of public history in Japan, with a particular focus on its digital aspects. The concept of digital public history has frequently been associated with what is known as the ‘Digital Archive’ in Japan. In a previous article written in Japanese, I argued that the widespread sharing of materials and the increasing use of crowdsourcing would broaden the scope of historiographical thinking. However, I also noted that the position of historiographical expertise would likely be challenged, necessitating its reorganisation. Although this essay was written only five years ago, the situation has evolved considerably since then. The landscape has fundamentally changed with the advent of generative Artificial Intelligence (AI) and the emergence of large-scale language models that extend beyond linguistic applications. Therefore, this paper reconstructs the argument originally presented in Japanese and introduces several points of contention in response to the current circumstances. I examine the discourse on generative AI concerning historical materials in Japan and use it as a case study to provide a basis for discussions on the state of digital public history.