### Status of XMASS.

Yasuhiro Kishimoto
The XMASS project aims to direct $^7{Be}/pp-$solar neutrinos, neutrino-less double beta decay, and darkmatter searches using ultra-pure liquid xenon. The first stage of the XMASS searches for darkmatter with 800 kg single-phase xenon-scintillator detector, whose construction was started in April 2007 and completed in September 2010. After installation of purified xenon, commissioning runs have been started since October 2010. Status of the current XMASS detector was reported, especially about evaluation of performance of event vertex...