The issue is that one of the reasons the TRD Supercharger kit was discontinued on the Tundra & Sequoia 4.7L was due to multiple engine failures at even recommended boost levels. I have not heard many people with 4Runner, Land Cruiser, or LX470 2UZ-FE having engine failures on their vehicles; but then again I haven't heard that many people running superchargers on their V8's either.
The weak link was found to be the Connecting Rods, as the early 1UZ-FE engines were very stoutly built, while progressively later engines had thinner connecting
Now some people theorize and suspect that the issue is that the US built 2UZ-FE engines utilize a different metallurgical formula in their rods that predisposes them to fracture/failure more readily than the Japanese built 2UZ-FE. According to Toyota literature, both use Sintered and Forged Connecting Rods; this means that the rods are forged from powdered metal being compacted and forged into shape.
Whether or not its true, I can't really say. Perhaps its a urban legend perpetuated by the often justified belief that American products are of typically lower or shadier quality than other countries such as the Germans and Japanese, or perhaps there's just a feeling of superiority of having that JDM tag attached. I couldn't tell you for sure, but I honestly wouldn't doubt that the American quality being suspect is the reason, I've seen enough Domestic cars and their "quality" to know better than to brush that off.
That being said, the engines should be rather identical in terms of the core components themselves. You will want a newer (stick with '02+) 2UZ-FE as I believe the earliest examples in the LC100's are not electronic throttle body. You will also want to make sure you stay with a Non-VVTi engine if you do not have it currently as it will require a new PCM and possible wiring harness to make work.
The main differences between the 4Runner & other 2UZ-FE's is going to be the exhaust manifold and engine brackets as the 2UZ-FE in our trucks are shoehorned in there and needed as much space as possible. The 120 platform is a much smaller frame than the full sized ones used in the Tundra/Sequoia and LC/LX470.
Ideally you want a 4Runner V8, but you should be okay with a newer 2UZ-FE provided you research which parts need to be replaced such as the exhaust manifolds and such.