There is latency involved in both production and detection to contend with. NYC to Tokyo would require an unprecedented beamline angled deep down into the eart

There is latency involved in both production and detection to contend with. NYC to Tokyo would require an unprecedented beamline angled deep down into the earth as well as a much more powerful proton driver to produce enough neutrinos to compensate for the 1/r^2 loss of flux. And, then there is the neutrino oscillation resonance due to the high matter density as the neutrinos pass near the Earth's core just to mix things up. The price tag for DUNE is a couple billion USD for a relatively "short" baseline of 1300 km and 40kton far detector. All that said, if some fat cat trader wants to fund it, I'll help build it.