The Korean Journal of Orthodontics enjoyed another great successful year in 2015. Hundreds of well-prepared manuscripts have been submitted from many countries for publication and, in reviewing of those manuscripts, our orthodontic experts have contributed in various ways to maintain a higher standard of the Journal. Among them, we hopes to extend our special thanks to the following international reviewers invited in 2015. Their expertise, dedication, and uncompromising demand for scientific sophistication were all instrumental to assuring the high quality expected by our readers.