T2K Results Restrict Possible Values of Neutrino CP Phase – Published in Nature, the results are a major step forward in the study of difference between matter and antimatter –
The T2K Collaboration has published new results showing the strongest constraint yet on the parameter that governs the breaking of the symmetry between matter and antimatter in neutrino oscillations. Using beams of muon neutrinos and muon antineutrinos, T2K has studied how these particles and antiparticles transition into electron neutrinos and electron antineutrinos, respectively.
From Tokyo Skytree's observatory, researchers prove time passes faster at a high altitude

A Japanese team of researchers has shown that time at Tokyo Skytree’s observatory — around 450 meters above sea level — passes four nanoseconds faster per day than at near ground level.

The finding, based on extremely precise “optical lattice clocks” that only go out of synch by one second every 16 billion years, proves Albert Einstein’s general theory of relativity, which predicts that clocks in a strong gravitational field will tick slower than those in a field with weaker gravity.

Japanese headlight maker switches gears to germ killer
Stanley Electric, a Japanese supplier of automotive headlights that often went unnoticed by investors before the novel coronavirus, possesses ultraviolet sterilizing technology considered crucial in preventing another outbreak.
The shape of water: what water molecules look like on the surface of materials
Water is a familiar substance that is present virtually everywhere. The properties of the first few layers of water molecules in contact with the surface of materials (called ‘surface water’) are especially important in materials science. In a recent study led by Prof Takahiro Yamamoto of Tokyo University of Science, scientists employed statistical data analysis tools to reveal what happens to water molecules on top of graphene.
Japan successfully zaps drones with microwave beams
It is one of the nightmares of the "drone age": waves of unmanned aircraft overwhelming defenses to unleash death and destruction. An agency under Japan's Defense Ministry is making progress toward countering the threat.