The Hyper-Kamiokande long-baseline neutrino-oscillation experiment in Japan will start in 2027 to measure the CP violating phase with a resolution better than 20 degrees and, for the first time, achieve the five standard deviation sensitivity to the discovery of the leptonic CP violation. It will inherit the magnetised near detector complex (ND280) from the T2K experiment. However, Hyper-Kamiokande, being affected by a much lower statistical uncertainty compared to T2K, will be more sensitive to the impact of systematic uncertainties. This highlights the potential need for a second upgrade of ND280 to measure the electron neutrino cross section and resolve the so-called nuclear effects by tracking very short protons and efficiently detecting neutrons. The R&D program at ETH Zurich aims to develop new scintillator detector technologies towards a multi-ton 3D-segmented scintillator detector as well as a high-resolution scintillating tracker. The most recent developments will be discussed.
