XVIII International Conference on Hadron Spectroscopy and Structure (HADRON2019)

X(3872) and Y(4260) are famous for their exotic nature. We present search for $B \to Y(4260) K$, $B \to X(3872) (\to \chi_{c1}\pi^0) K$ and $B \to X(3915)(\to \chi_{c1} \pi^0) K$ at Belle based on the full data sample accumulated by the Belle experiment at KEKB asymmetric energy $e^+ e^-$ collider. As no signal is found, upper limit on the product branching fraction is provided. We also report evidence of $B \to h_c K$ along with first observation of the decay $\eta_c(2S)-> p \bar{p} \pi^+ \pi^-$ in Belle.