This state shows properties different from a conventional ${{\mathit q}}{{\overline{\mathit q}}}$ state. A candidate for an exotic structure. See the review on "Heavy Non-${{\mathit q}}{{\overline{\mathit q}}}$ Mesons." Seen by AAIJ 2021E in ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit X}{(4630)}}{{\mathit K}^{+}}$ with ${{\mathit X}{(4630)}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$ using an amplitude analysis of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}{{\mathit K}^{+}}$ with a significance (accounting for systematic uncertainties) of 5.5 $\sigma $. The $\mathit J{}^{P} = 1{}^{-}$ assignment is favored over ${}^{}2{}^{-}$ with a significance of 3 $\sigma $ and other assignments are disfavored by more than 5 $\sigma $.