Seminar: Chihiro Tokoku - Subaru Telescope, Tuesday Jan. 9th 2007 Title: A new NIR multi-object spectrograph for the Subaru Telescope Abstract: A brand new and powerful NIR spectrograph for the Subaru Telescope (MOIRCS : Multi-Object InfraRed Camera and Spectrograph) has just opened to the public from this September. Unique exchange mechanism for cooled multi-slit masks enables us to conduct low-resolution multi-object spectroscopy (MOS) in the NIR wavelength range up to K-band for more than 50 objects simultaneously. I will introduce the system of the MOS part of MOIRCS and observation technique.