Professor Hidenori Watanave's Lab: Pioneering Digital Archives for Peace

At the heart of this project is Professor Hidenori Watanave's laboratory, a hub within the University of Tokyo's Graduate School of Interdisciplinary Information Studies. For over a decade, the lab has specialized in information design, developing digital archives that 'fluidize' static historical data into dynamic, accessible formats. Key outputs include the renowned Hiroshima Archive and Nagasaki Archive, which overlay survivor photographs and testimonies onto interactive maps using multiscreen displays and AI-enhanced colorization of black-and-white wartime images.

Watanave's approach integrates artificial intelligence (AI), where algorithms restore colors to pre-1945 photos, breathing life into forgotten streets and faces. This technology extends to VR environments, enabling users to 'walk' through bombed landscapes as if present. The lab's work exemplifies how UTokyo fosters interdisciplinary graduate programs, merging computer science with humanities to address societal challenges like nuclear disarmament. Students here don't just code; they curate narratives that bridge Japan's past with global futures.

Building on previous exhibitions, such as the 2022 'Convergence of Peace Activities' at UTokyo's New York office—coinciding with an earlier NPT review—the current display evolves these efforts. That event featured Ukraine war damage alongside atomic archives, highlighting technology's role in converging peace initiatives across conflicts.

Misaki Katayama: A Third-Generation Survivor's Drive for Digital Legacy

Leading the charge is Misaki Katayama, a 27-year-old graduate student from Onomichi City in Hiroshima Prefecture and a third-generation atomic bomb survivor, or 'hibakusha' descendant. Katayama's personal connection fuels her research: her grandmother, then 11, entered Hiroshima the day after the bombing to search for Katayama's great-grandfather. Amid the ruins, she witnessed unimaginable horrors—people with skin sloughing off their arms—and later found her father at a first-aid station, where he succumbed to burns.

These stories, shared during family summer gatherings, inspired Katayama's path. As a high schooler at Hiroshima Prefectural Hiroshima High School, she served as a peace ambassador, petitioning the UN's European headquarters in Geneva for nuclear abolition. 'Please continue conveying the tragedy,' staff urged, igniting her commitment. Now at UTokyo, she designs workshops for elementary students in Hiroshima and Nagasaki, using Minecraft to rebuild pre-bomb landmarks like Hiroshima's central shopping district and Nagasaki's Urakami Cathedral.

In New York, Katayama guided visitors through slides of her workshops, emphasizing reconstruction's power: children first study maps and photos, hear survivor tales, then build in-game. 'Knowing daily life before the bomb clarifies its atrocity,' she explains. Her vision includes international workshops, amplifying Japanese higher education's role in global empathy-building.

Technology Breakdown: VR Avatars, Minecraft, and AI in Action

The exhibition's tech stack showcases graduate-level innovation at UTokyo. VR headsets immerse users as avatars amid Hiroshima's post-blast desolation—twisted metal, ash-covered ruins, echoing survivor paths. Unlike passive videos, this first-person navigation fosters emotional connection, making abstract history visceral.

Minecraft serves as an accessible entry for youth: students layer historical data onto its block-based world, recreating streets from archival photos. AI colorization revives monochrome images, while digital maps pinpoint survivor locations, triggering video testimonies. Four lab members managed the setup, explaining to diverse crowds including academics and hibakusha.

This fusion reflects Japan's higher ed shift toward experiential learning. UTokyo's interdisciplinary programs equip grad students with tools like Cesium for 3D geospatial modeling, used in past lab projects. Such skills prepare them for careers in edtech, cultural preservation, and international NGOs.

Synchrony with NPT Review: Amplifying Japan's Voice in Global Nuclear Discourse

Timing the exhibition with the NPT review conference—attended by global delegates debating non-proliferation—was strategic. As atomic survivors dwindle (average age over 85), digital tools ensure their voices endure. The UN proximity drew policymakers, survivors like 82-year-old Noriko Hamanaka from Nagasaki, and experts like UC Professor Setsu Shigematsu.

Hamanaka, bombed in Nagasaki, praised colorized photos for evoking nostalgia and easing peace education without direct survivor travel. Shigematsu noted its accessibility for sparking nuclear interest. Prof. Watanabe envisions overseas expansion, leveraging youth's digital fluency for lasting impact.

In Japanese universities, such initiatives align with national peace curricula, mandated since 1947. UTokyo exemplifies this, hosting labs that export tech-driven advocacy.

Resonance and Reception: Bridging Generations and Borders

Visitors lauded the exhibit's intuitiveness. Shigematsu called it a 'good opportunity' for engagement; Hamanaka saw it revolutionizing classrooms. Katayama's workshops already engage hundreds of kids annually, proving efficacy.

UTokyo's New York office facilitates such outreach, hosting prior events. This positions the university as a leader in global higher ed, where grad research influences policy. Feedback loops—visitor surveys, workshop metrics—refine projects, embodying research excellence.

UTokyo's Broader Role in Peace Technology and Higher Education

The University of Tokyo, Japan's top-ranked institution per QS 2026 Asia Rankings, invests heavily in interdisciplinary graduate studies. Programs like Interdisciplinary Information Studies (full name: Graduate School of Interdisciplinary Information Studies, or IGS) blend tech with social sciences, producing alumni in academia, tech firms, and diplomacy.

Watanave's lab contributes to national efforts like the Hiroshima-Nagasaki digital archives, supported by MEXT grants. Enrollment in related fields surges 15% yearly, driven by societal demand for ethical AI and VR in heritage.

Challenges include funding tech infrastructure amid Japan's shrinking student population, yet UTokyo counters with international collaborations.

Digital Preservation Challenges and Innovations in Japanese Universities

As Japan grapples with demographic decline—university enrollment down 5% since 2020—digital tools sustain engagement. VR reduces costs versus physical museums; Minecraft democratizes creation, appealing to Gen Z.

Other unis like Hiroshima University pioneer similar VR for local history. UTokyo leads nationally, with 20+ peace-related labs. Ethical concerns—trauma recreation sensitivity—are addressed via survivor consultations.

Peace Studies Evolution: From Lectures to Immersive Experiences

Japan's higher ed mandates peace education, but traditional lectures yield fading retention. UTokyo's model—hands-on VR/Minecraft—boosts comprehension 40% per lab studies. Workshops integrate step-by-step: historical context, survivor input, digital build, reflection.

Nationwide, 80% of universities offer peace modules; UTokyo's stand out for tech integration. This prepares grads for UNESCO roles, edtech startups.

Photo by Luke Galloway on Unsplash

Global Implications and Future Outlook for Tech-Driven Peace Education

Katayama eyes overseas workshops; lab plans Ukraine expansions. As AI advances, ethical frameworks from UTokyo could standardize global digital heritage.

For Japanese higher ed, this signals a renaissance: tech counters enrollment dips, enhances rankings. UTokyo grads emerge as peace innovators, proving universities' societal pivot.

Ultimately, this exhibition transcends commemoration, urging action in an NPT era fraught with tensions. It affirms higher education's power to heal history's wounds through innovation.