  We conducted the coincidence measurement of $\alpha$ particles inelastically
scattered from ${}^{20}$Ne at $0^{\circ}$ and decay charged particles in order
to search for the alpha-particle condensed state. We compared the measured
excitation-energy spectrum and decay branching ratio with the
statistical-decay-model calculations, and found that the newly observed states
at $E_x$ = 23.6, 21.8, and 21.2 MeV in ${}^{20}$Ne are strongly coupled to a
candidate for the 4$\alpha$ condensed state in ${}^{16}$O. This result presents
the first strong evidence that these states are the candidates for the
5$\alpha$ condensed state.
