Recent spectroscopy studies at Belle

The analyses of states with double cs content and the search for exotics have recently gained much attention. The Belle experiment collected roughly 1 ab^-1 integrated luminosity data. While Belle II data-taking is in progress, we have performed a new search for exotic states and cross-section measurements with the full Belle data sets. Here we review the recent analysis of: (a) e^+e^- Dₛ^ (*) ++Dₒ₉^- + c. c. from both (2S) decays and continuum production at 10. 52 GeV, using the Belle detector at KEKB; (b) the analysis of e^+e^- c J/ + c. c. and search for double charmonium states; (c) the study of e^+e^- Dₛ^+Dₒ₀ (2317) ^- + c. c. and e^+e^- Dₛ^+Dₒ₁ (2460) ^- + c. c. + anything else, in the continuum. Born cross-sections are evaluated, and a possible confirmation of the states seen in the invariant mass system of J/ by LHCb in B decays has been investigated.