 The beam upgrade plan requires one year long shut down of the J-PARC Main Ring accelerator in 2021, followed by a constant gradual increase of the proton beam power until the start of the HK experiment.The beam power should reach 750 kW in 2022 and then grow to 1.3 MW by 2029.In February 2020, the proton beam power reached 515 kW with 2.7x1014 protons per pulse and with 2.48 seconds between pulses (so-called repetition cycle).