But I'm having difficulties finding any conclusive info on this (perhaps I'm not looking hard enough).
Be that as it may, I'd say we keep the pen name since it's far more widespread; his website, blog and Amazon books are all under the Tamaoki Benkyo name.
Yeah I couldn't find much on his real name and just went with what ANN had. All I know is that this guy does a lot of regular manga and a lot of guro manga. Nasty stuff.