Designed as a companion and study guide for the textbook "Comprehending Technical Japanese," this book may also be used as a supplement to the textbook "Basic Technical Japanese." It provides detailed explanations of the origin and meaning of the 500 kanji featured in "CTJ," which were chosen for their frequency and significance in chemistry, physics, and biology. Each chapter is keyed to a chapter in "CTJ," presenting twenty kanji, vocabulary that use those kanji, a kanji-card format for study and review, and the Japanese essay that appears at the close of each "CTJ" chapter, and its English translation. This volume also introduces significant scientific vocabulary that include kanji other than the 500 introduced in" CTJ."Daub, Edward E. is the author of 'Kanji for Understanding Technical Japanese', published 1995 under ISBN 9784130870528 and ISBN 4130870521.