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We study the role of the $f_1(1285)$ resonance in the decays of $J/\psi \to\phi \bar{K} K^*$ and $J/\psi \to \phi f_1(1285)$. The theoretical approach isbased on the results of chiral unitary theory where the $f_1(1285)$ resonanceis dynamically generated from the $K^* \bar{K} - c.c.$ interaction. In order tofurther test the dynamical nature of the $f_1(1285)$ state, we investigate the$J/\psi \to \phi \bar{K} K^*$ decay close to the $\bar{K} K^*$ threshold andmake predictions for the ratio of the invariant mass distributions of the$J/\psi \to \phi \bar{K} K^*$ decay and the $J/\psi \to \phi f_1(1285)$ partialdecay width with all the parameters of the mechanism fixed in previous studies.The results can be tested in future experiments and therefore offer new clueson the nature of the $f_1(1285)$ state.

Role of the $f_1(1285)$ state in the $J/\psi \to \phi \bar{K} K^*$ and $J/\psi \to \phi f_1(1285)$ decays