The 32nd Japanese Hip Society (JHS) Congress was held November 6–8, 2005, in Niigata, Japan. Guest speakers from many countries and specialists for hip disease presented papers that focused on joint preservation for osteoarthritis of the hip, joint preservation for aseptic necrosis of the femoral head, treatment for epiphyseolysis capitis femoris, and up-to-date information and knowledge on joint arthroplasty. Altogether, there were many important presentations about joint preservation and replacement. This book covers the main themes of the congress