If by toku you mean "special effects", then yes.
However, if by toku you mean "people who beat up monsters" then no. Star Trek doesn't feature that stuff.
OK yes there are monsters and Captain Kirk gets into brawls now and again but he doesn't wear armour or spandex when fighting.
And the beating up stuff doesn't happen on a regular basis either. At least not physically human vs. human. Alright so you do get ship vs. ship fights.
Screw what I said. I don't think of Star Trek as a toku, but from the paragraphs I've written above, you could argue it is.
When I think of toku, I think of superheroes fighting against organisations bent on evil. That doesn't happen regularly in Trek. OK, so there was the Dominion War in DS9 and the Xindi in Enterprise but it isn't like in Power Rangers when they're always doing it. And you do get superhuman characters, but they don't recruit a superman or an elite force to wear spandex/armour and go beating up aliens every week.
Right, I'm rambling, I'll stop.