Japan's national accelerator laboratory contributing particle physics, neutrino science, and cosmology expertise to Europe-Japan research collaborations.
KEK is Japan's premier particle physics laboratory, operating major accelerator facilities including the SuperKEKB collider and the J-PARC proton accelerator complex. They conduct fundamental research in high-energy physics, neutrino science, and cosmology, providing experimental infrastructure and scientific expertise to international collaborations. In H2020 projects, KEK contributes as a non-EU partner bringing world-class accelerator technology, detector expertise, and data analysis capabilities to Europe-Japan research programmes spanning particle physics, neutrino oscillation experiments, and next-generation collider design.
Central to E-JADE (accelerator development exchange), EuroCirCol (circular collider study), and FCCIS (Future Circular Collider), plus JENNIFER/JENNIFER2 accelerator-based neutrino research.
Core contributor to JENNIFER, JENNIFER2 (neutrino and intensity frontier research), and PROBES (neutrino oscillations, CP violation).
CMB-INFLATE focuses on CMB polarization analysis and instrumentation; PROBES covers gravitational wave detector physics.
JENNIFER2 includes dark photon searches; PROBES addresses dark matter, charged lepton flavour violation, and physics beyond the Standard Model.
FCCIS explicitly addresses socio-economic impacts, EU smart specialisation, and open innovation in the context of future research infrastructure.
KEK's early H2020 involvement (2015-2018) centred on accelerator technology exchange and collider design studies (E-JADE, EuroCirCol, JENNIFER), reflecting its core identity as an accelerator laboratory building Europe-Japan bridges. From 2019 onward, their portfolio broadened significantly into flavour physics, CP violation, dark matter searches, cosmological observations, and gravitational wave science (JENNIFER2, PROBES, CMB-INFLATE). This shift shows KEK expanding from pure accelerator hardware expertise toward the physics questions those accelerators investigate, plus new observational domains like CMB polarization.
KEK is moving beyond accelerator engineering into multi-messenger physics — combining particle, neutrino, gravitational wave, and cosmological observations — making them a versatile partner for ambitious fundamental science programmes.
KEK never coordinates H2020 projects — all 7 participations are as partner or third party, consistent with their status as a non-EU institution contributing international expertise. They work in large consortia (91 unique partners across 27 countries), mostly through MSCA-RISE staff exchange programmes that facilitate researcher mobility between Japan and Europe. This makes them a reliable, low-overhead international partner who brings facilities and expertise without seeking to lead EU administrative processes.
KEK has collaborated with 91 unique partners across 27 countries, reflecting genuinely global reach anchored in the international particle physics community. Their network spans the major European and Asian accelerator laboratories and university groups involved in high-energy and neutrino physics.
KEK is one of the very few non-European national laboratories with sustained, deep participation in H2020 research programmes — a direct bridge between European and Japanese particle physics communities. They operate world-class facilities (SuperKEKB, J-PARC) that no European partner can replicate, making them essential for projects requiring access to Japanese accelerator infrastructure. For consortium builders, KEK brings international prestige, complementary experimental capabilities, and an established track record of Europe-Japan researcher exchange.
