  Recently, the $\Xi(1620)$ resonance has attracted much attention, thanks to
detailed experimental data by the Belle and ALICE collaborations. This
experimental progress has prepared us to conduct theoretical analyses based on
experimental data. In this study, we analyze the $\Xi(1620)$ resonance using
the chiral unitary model and discuss the properties of the $\Xi(1620)$
resonance and the $K^-\Lambda$ scattering length.
