Little quantitative research has been conducted on the detailed expressions of story characters. This study focuses on the utterances of story characters and constructs a fundamental dataset. To compare different story genres, five popular genres (adventure, battle, love, detective, and horror) in modern Japan entertainment culture were selected based on comic and game sales rankings. Approximately 26,000 utterances of story characters in the five genres were randomly selected. The selected utterances were categorized from the perspective of speech acts. Genre and character role comparisons based on a chi-square test and residual analysis clarified the tendencies of each genre. Factor analysis was used to extract utterance patterns for each genre, and three general purpose utterance patterns were clarified: question-answering type, attacking type, and proposal type. The results demonstrate the usefulness of utterance data construction and speech act analysis.

This article examines gendered emotional patterns in Japanese Atomic Bomb Literature through sentiment analysis (SA), challenging the assumption that women’s writing is inherently caregiving. Using the Oseti SA model, the study introduces sentiment protection, a measure of how authors shield their characters from trauma. Findings reveal that male authors exhibit stronger sentiment protection than female writers, reversing traditional gender expectations. Analyzing hibakusha and non-hibakusha authors, the study suggests that sentiment protection functions as a genre-defining feature, with male writers adhering to narrative conventions while female authors demonstrate greater variability. Bridging feminist literary criticism, digital humanities, and reception theory, this study formalizes gendered writing assumptions into computationally testable hypotheses. By integrating algorithmic criticism, this research provides a data-driven perspective on gender, trauma, and genre in Japanese war literature, offering new insights into the emotional structures of narratives depicting nuclear catastrophe.

Community-driven cultural heritage archives are on the rise, yet face persistent challenges in sustainability, particularly when transitioning from physical to digital formats. This is especially the case for sister city association projects, which are often volunteer-led and both preserve and serve multilingual and transnational communities. This article examines the Maine–Aomori Printmaking Society (MAPS) Online Archive & Repository as a case study of a grassroots, transnational arts initiative preserved through a “digital twin” using the open-source platform CollectionBuilder. The intent of the study is to explore an accessible, low barrier of entry digital preservation tool that is metadata-driven, customizable, and multilingual, enabling sister cities to maintain control over their community cultural heritage without the need for institutional support. Long-term stewardship capabilities of CollectionBuilder and similar web-based platforms as community archival tools are assessed, with special consideration to volunteer-based knowledge transfer and technical accessibility in regards to community project autonomy. The MAPS Online Archive & Repository demonstrates the potential of digital humanities tools to grant sister cities autonomy, support cross-cultural heritage exchange, and create digital twins that broaden the reach of community cultural heritage projects active on the ground.