Ikeda, H. Arinaga, M. Flanagan, J.W. Fukuma, H. Ishii, H. Iwabuchi, S.H. Mitsuka, G.M. Mori, K. Tejima, M. Tobiyama, M. JACoW Publishing Geneva, Switzerland 978-3-95450-201-1 10.18429/JACoW-IBIC2018-MOPA02 English 29-32 MOPA02 injection timing radiation extraction operation Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-IBIC2018-MOPA02 http://jacow.org/ibic2018/papers/mopa02.pdf The SuperKEKB damping ring (DR) commissioning started in February 2018, before main ring (MR) Phase-II operation. We constructed the DR in order to deliver a low-emittance positron beam. The design luminosity of SuperKEKB is 40 times that of KEKB with high current and low emittance. A turn-by- turn beam position monitor (BPM), transverse feedback system, synchrotron radiation monitor (SRM), DCCT, loss monitor using ion chambers, bunch current monitor and tune meter were installed for beam diagnostics at the DR. An overview of the instrumentation and status will be presented.