KOTO is a rare kaon experiment with the primary goal of probing new physics by measuring the $K_{L} \to \pi^0 \nu \overline{\nu}$ decay. The $K_{L} \to \pi^0 \nu \overline{\nu}$ decay is of interest because of its theoretical cleanness and direct CP-violating process, which offers a clean ground for testing various new physics models. However, its small decay probability of $3 \times 10^{-11}$ makes this measurement extremely challenging. KOTO is the first experiment with the experimental sensitivity of ~$\cal{O}(10^{-11})$ to test the standard model predicted area and is expected to achieve this goal in the coming few years, based on the J-PARC beam intensity in 2022, new detectors implementation through 2019-2023 for the background controls, and a new DAQ system upgrade in 2022-2023 to tolerate the high trigger rate. In this talk, I will recap the current analysis status, detector/DAQ upgrades, and the prospects of KOTO.