 T2K was the first experiment which observed the appearance of electron neutrinos in muon neutrino beam, it also provided the world best measurement of oscillation parameter "θ"23  and a hint of a significant matter-antimatter asymmetry in neutrino oscillations.The measurement of the neutrino-antineutrino oscillation asymmetry may bring us closer to the explanation of the existence of our matter-dominated Universe.The intense beam of muon neutrinos is produced in the J-PARC facility (Japan Proton Accelerator Research Complex) in Tokai on the east coast of Japan.