  We study kinks in a wide class of noncommutative (NC) field theories. We find
rich structure of the static kinks in DBI type NC tachyon action for an
unstable D$p$-brane with general constant open string metric and NC parameter.
Among which thick topological BPS NC kink and tensionless half-kink are
particularly intriguing. Reproduction of the correct decent relation between
D$p$ and D$(p-1)$ lets us interpret the obtained NC kinks as codimension-one
D-brane and its composites. If we turn on DBI type NC U(1) gauge field on an
unstable D2-brane, only constant field strength is allowed by gauge equation
and NC Bianchi identity. Inclusion of the NC U(1) gauge field induces
fundamental string charge localized on the codimension-one brane, which turns
D$(p-1)$ into D$(p-1)$F1.
