This is an application of lexicase, an empirical lexicalist monostratal dependency variety of generative case grammar to the analysis of complement constructions in Japanese. Particular emphasis is placed on the following two aspects: (1) the examination of word boundaries involved in complementizer-less complement constructions, and (2) the subcategorization of complement-taking predicates as determined by their syntactic properties. The results of the investigation are formalized in terms of the lexicase entries, the redundancy rules and subcategorization rules, which are needed to make the grammar formal and explicit. The final part of the study formulates semantic interpretation rules to match the contextual features of the regent with those of its overt dependents which satisfy these features (linking rules) and to provide appropriate interpretations for non-overt subjects of complement clauses (chaining rules).