On behalf of the IRSF/SIRIUS group, I introduce some recent results from our deep near-infraredsurveys (J, H and Ks bands, limiting magnitude of Ks=17) toward star forming regions in the MilkyWay Galaxy (MWG) and Large Magellanic Cloud (LMC) with the near-infrared camera SIRIUS. Wediscovered a rich population of low-mass young stellar objects associated with the W3 and NGC 7538regions in the MWG based on the near-infrared colors and magnitudes. The high sensitivity of oursurvey enables us to detect intermediate-mass pre-main sequence stars, i.e. HAEBE stars, even in theLMC. We detected many HAEBE candidate stars in the N159/N160 complex star forming region inthe LMC with the IRSF 1.4-m telescope. Spatial distributions of the young stellar objects indicate thesequential cluster formation in each star forming region in the complex and large scale (a few 100 pc)sequential cluster formation over the entire complex.