an understanding of which the so-called 'mystery' of Japanese aesthetics would remain incomprehensible. The present work primarily purports to clarify the keynotes of the artistic experiences that are typical of Japanese culture, in terms of a special philosophical structure underlying them. It consists of two main parts: (1) Preliminary Essays, in which the major philosophical ideas relating to beauty will be given a theoretical elucidation, and (2) a selection of Classical Texts representative of Japanese aesthetics in widely divergent fields of linguistic and extra-linguistic art such as the theories of waka- poetry, Noh play, the art of tea, and haiku. The second part is related to the first by way of a concrete illustration, providing as it does philological materials on which are based the philosophical considerations of the first part.