Vacua and walls of mass-deformed K\"{a}hler nonlinear sigma models on $SO(2N)\mathrm{/}U(N)$

We construct walls of mass-deformed K"{a}hler nonlinear sigma models on $SO(2N)\mathrm{/}U(N)$, by using the moduli matrix formalism and the simple roots of $SO(2N)$. Penetrable walls are observed in the nonlinear sigma models on $SO(2N)\mathrm{/}U(N)$ with $N>3$.