Differential Evolution of Lyman Break Galaxies from $z$=5 to 3
  We briefly summarize our findings from the unbiased surveys for $z$$\sim$5 LBGs based on Subaru/Suprime-Cam and follow-up optical spectroscopy. 
Ikuru Iwata, Kouji Ohta, Marcin Sawicki, Naoyuki Tamura, Masayuki   Akiyama, Kentaro Aoki