We conducted an extremely wide field survey of z ~ 6 Lyman break galaxies (LBGs) to precisely derive their bright end surface density overcoming the bias due to cosmic variance. We selected out LBG candidates in the Subaru/ XMM-Newton Deep Survey Field (SXDS) over the total of 1.0 deg2 sky area down to z'AB = 26.0 (≳ 3σ, 2"0 aperture) using i' - z' > 1.5 color cut. This sample alone is likely to be contaminated by M/L/T dwarfs, low-z elliptical galaxies, and z ~ 6 quasars. To eliminate these interlopers, we estimated their numbers using an exponential disk star count model, catalogs of old ellipticals in the SXDS and other field, and a z ~ 6 quasar luminosity function. The finally derived surface density of z ~ 6 LBGs was 165 mag-1 deg-2 down to z'AB = 26.0 and shows good agreement with previous results from the narrower field survey of HST GOODS.

An updated project status review of the Japan 8m telescope, Subaru, scheduled for its first light in the second quater of 1998 atop Mauna Kea is given.