Thanks to Emperor_Andreas, which provided me the necessary pictures, here is Nasami as of 1938:
She was modified before completion to address stabiliy issues after the infamous Tomozoru incident. It is mentioned that Natsushima was modified in a similar way, but in this case there is no phothographic evidence to be exploited for a drawing.
Sarushima, the third unit of the class, was a variant with diesel engines. I've found just a single picture of her, not detailed enough for my tastes, so I'll hold her for now.