I know that the Splash Mountains at Magic Kingdom and Tokyo Disneyland were developed at the same time and even opened a day apart from each other. I had heard or read somewhere that the reason why the logs for Japan were designed to be 4 rows of 2 adults were to increase capacity and that Japanese attitudes about potentially sitting between someone’s legs were not positive. I also read that they decided to use the tokyo logs in Florida as a cost saving measure. Can someone confirm or refute this for me?