  Tauchi provides an example illustrating the action of a real algebraic
subgroup $H$ of $GL(2n, \mathbb{R})$ with finitely many orbits on
$\mathbb{R}^{2n}$, while the dimension of the space of relative $H$-invariant
distributions on $\mathbb{R}^{2n}$ is infinite. We offer a perspective on this
example from the viewpoint of D-modules, where we explicitly determine the
simple quotient regular holonomic D-modules and demonstrate that the
distributions exhibit an enlarged symmetry.
