The first commissioning of the SuperKEKB, which is an electron-positron collider with asymmetric energies in KEK, has started in February 2016. A major task of the commissioning was the vacuum scrubbing of new beam pipes to increase the beam lifetime and decrease the background noise of the particle detector in anticipation of the coming physics run. The vacuum pressures along the ring were monitored, and the rate of decrease was measured to estimate the vacuum scrubbing effect. The residual gases were monitored at the same time. The temperatures of new vacuum components such as the bellows chambers, gate valves, and beam collimators were continuously checked. The effects of the antechambers and TiN coating on the electron cloud effect were preliminarily evaluated.