The New Energy and Industrial Technology Development Organization (NEDO) and the Japan Coal Energy Center (JCOAL) have jointly prepared this guide as a review of the history of "Clean Coal Technology (CCT)" in Japan, to systematically describe the present state of CCT insofar as possible, and to provide useful material for novel technological innovation.NEDO and JCOAL hope this brochure will be helpful in elucidating why Japan's CCT is an attractive technology in the ever-increasing complexity of coal utilization owing to global warming and other environmental issues. NEDO and JCOAL also hope this brochure will encourage rapid progress in CCT development and the foundation of innovative clean coal utilization systems.