This volume contains selected research papers of Professor Bunji Sakita. Included are his pioneering papers on SU(6) symmetry, strong coupling theory, string theory, supersymmetry and the method of collective co-ordinates. There is also a personal account of his journey in physics.

Strong coupling of the multi-partial wave meson isotriplet, B. Sakita; generalization of dual models, J.-L. Gervais and B. Sakita; functional approach to strong-coupling theory in static models I - charge-scalar models, G.C. Branco et al; gauge degrees of freedom, external changes, quark confinement criterion in A0=0 canonical formalism, J.-L. Gervais and B. Sakita; SO(2N) grand unification in an SU(N) basis, R.N. Mohapatra and B. Sakita; chiral symmetry and chiral anomaly in incommensurate charge-density-wave system, Z.-B. Su and B. Sakita; local chiral symmetry and charge-density waves in one-dimensional conductors, B. Sakita and K. Shizuya. (Part contents)