Sure. But, it is popular. Guests like it. Even Tokyo wanted one. How often in recent memory has Tokyo asked for a copy of an American ride?
They've cloned from everyone including the US parks quite heavily. That's always been the case except for DisneySea's opening lineup which was largely clone free. Tokyo Disneyland itself was probably the most "cloned" park of any of Disney's offerings when it opened. I know you're saying in recent memory so I'll discount all of that. But still, before TDS, almost every ride at TDL was a clone of an American counterpart and since TDS has opened, it's also been largely clones from the US or other parks too:
Since TDS opened:
Turtle Talk (Cloned from EPCOT, DCA and HKDL)
Buzz Lightyear (originated at WDW, was upgraded for Tokyo, then cloned everywhere else)
Tower of Terror (in concept arts, it was intended to be WDW's version, instead ended up an updated clone of DCA's, which was supposed to be in Paris originally- but Tokyo ASKED for a Tower of Terror, then made the decision in conjunction with Disney to use the cheaper ride system along with a new theme, since Twilight Zone was largely unknown in Japan)
Raging Spirits (Cloned/updated ride from Paris, which itself is a clone of a carny coaster)
Toy Story Mania (Cloned from the stateside parks as you mentioned)
Philharmagic (Cloned from WDW and HKDL)
Star Tours II (Cloned from the stateside parks)
Stitch Encounter (Cloned/updated from Paris and Hong Kong)
The only unique rides I can think of is Monsters Inc, and now the BatB dark ride. It's been literally all clones otherwise. Am I missing something (I may be, but that's what I came up with off the top of my head)? Of the attractions that Tokyo's done in the last 15 years, they've all been clones and many of them have been from original US attractions. They've added some bells and whistles, but more than half of those rides originated in the states and the other half are still just clones.
I love Tokyo's parks and many of their attractions are unique and spectacular. But plenty are also just clones. Some from the US parks, some from elsewhere. Lets be real about that (aside from TDS's original lineup) while still acknowledging that there's a great deal of things that set Tokyo apart from other properties.