Introduction.- Enrichment of r-Process Elements in Dwarf Spheroidal Galaxies in the Chemodynamical Evolution Models.- Early Chemodynamical Evolution of Dwarf Galaxies Deduced from r-Process Elements.- Enrichment of Zinc in Dwarf Galaxies.- Efficiency of Metal Mixing in Dwarf Galaxies.- Enrichment of r-Process Elements in a Cosmological Context.- Conclusions and Future Prospects.