Due to the agglutinative character, Japanese and Ryukyuan morphology is predominantly concatenative, applying to garden-variety word formation processes such as compounding, prefixation, suffixation, and inflection, though nonconcatenative morphology like clipping, blending, and reduplication is also available and sometimes interacts with concatenative word formation. The formal simplicity of the principal morphological devices is counterbalanced by their complex interaction with syntax and semantics as well as by the intricate interactions of four lexical strata (native, Sino-Japanese, foreign, and mimetic) with particular morphological processes. A wealth of phenomena is adduced that pertain to central issues in theories of morphology, such as the demarcation between words and phrases; the feasibility of the lexical integrity principle; the controversy over lexicalism and syntacticism; the distinction of morpheme-based and word-based morphology; the effects of the stage-level vs. individual-level distinction on the applicability of morphological rules; the interface of morphology, syntax, and semantics, and pragmatics; and the role of conjugation and inflection in predicate agglutination. In particular, the formation of compound and complex verbs/adjectives takes place in both lexical and syntactic structures, and the compound and complex predicates thus formed are further followed in syntax by suffixal predicates representing grammatical categories like causative, passive, negation, and politeness as well as inflections of tense and mood to form a long chain of predicate complexes. In addition, an array of morphological objects—bound root, word, clitic, nonindependent word or fuzoku-go, and (for Japanese) word plus—participate productively in word formation. The close association of morphology and syntax in Japonic languages thus demonstrates that morphological processes are spread over lexical and syntactic structures, whereas words are equipped with the distinct property of morphological integrity, which distinguishes them from syntactic phrases.
