1 Introduction  
2 Data and Method  
2.1 Selection of target stars  
2.2 Algorithm for the detection of candidate UFDs  
3 Results  
3.1 Summary of the MW satellites in the HSC-SSP footprint  
3.2 Distance estimate  
3.3 Structural parameters  
3.4 V-band absolute magnitude  
4 Discussion  
4.1 Comparison with globular clusters and other MW satellites  
4.2 Implication for ΛCDM models  
5 Conclusions