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We consider the multicomponent Yajima-Oikawa (YO) system and show that thetwo-component YO system can be derived in a physical setting of three-couplednonlinear Schr\"odinger (3-CNLS) type system by the asymptotic reductionmethod. The derivation is further generalized to multicomponent case. This setof equations describes the dynamics of nonlinear resonant interaction betweenone-dimensional long-wave and multiple short-waves. The Painlev\'e analysis ofthe general multicomponent YO system shows that the underlying set of evolutionequations is integrable for arbitrary nonlinearity coefficients which willresult in three different sets of equations corresponding to positive, negativeand mixed nonlinearity coefficients. We obtain general bright $N$-solitonsolution of multicomponent YO system in the Gram determinant form by usingHirota's bilinearization method and explicitly analyze the one- and two-solitonsolutions of the multicomponent YO system for the above mentioned three choicesof nonlinearity coefficients. We also point out that the 3-CNLS system admitsspecial asymptotic solitons of bright, dark, anti-dark and grey types, when thelong-wave--short-wave resonance takes place. The short-wave component solitonsundergo two types of energy sharing collisions. The solitons appearing in thelong-wave component always exhibit elastic collision whereas that of short-wavecomponents exhibit standard elastic collisions only for specific choice ofparameters. We have also investigated the collision dynamics of asymptoticsolitons in the original 3-CNLS system. For completeness, we explore thethree-soliton interaction and demonstrate the pair-wise nature of collision andunravel fascinating state restoration property.

General multicomponent Yajima-Oikawa system: Painlev\'e analysis, soliton solutions, and energy-sharing collisions