Jacks'n Joker! They were pretty cool, I have their self-titled album. I hadn't previously thought of them as sounding like DTR but I'll take another listen and see. For sure they seem like the kind of thing Taiji might be into, though.
I never knew they had a Gastunk connection, that's really interesting.
And heheh, yeah, Taiji does have that exact shirt. Though I guess it's not that weird since a lot of guys in the glam metal scene wear Lip Service brand stuff, Bret Michaels (Poison) in the Unskinny Bop video has the pants for example. (But not the exact ones that the Jacks'n Joker guy on the far right does... little bit different.)
Another possible DTR influence: The Cult? English band, hard rock with some Native American themes.