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Resonant emission spectra of YF 3 , YCl 3 , Y 2 O 3 , and Y-metal are observed across Y L III absorption threshold. When the incident photon energy is below the absorption threshold, only Raman scattering component is observed. The Raman-scattering component has a two-peak structure, main and subpeaks. Above the absorption threshold, both Raman and normal L ␣ emission peaks are observed in insulator samples. The intensities of the Raman peak are resonantly enhanced as the incident photon energy reaches the absorption edge. On the other hand, in Y metal, only normal L ␣ emission peak is observed. Obtained spectra are decomposed into Raman and normal L ␣ emission peaks by line-shape analysis. The results are compared with theoretically calculated ones and are discussed the relaxation of core-electron excitation processes. The onset energy of the normal L ␣ emission peak is estimated and discussed in relation of the electronic structure of these compounds.