This volume in honor of Prof Tetsuro Kobayashi's 63rd birthday includes essays written by his students, colleagues and friends for the occasion. The first part, a detailed account of a variety of new physics to be explored at HERA and at new accelerators planned or proposed, is particularly interesting for researchers and students who want to learn about today's aspects of the phenomenology of supersymmetry. The latter part covers a wide variety of subjects ranging from quantum mechanics, chaos, to particle physics.
