While his assessment of modern-day Japan stands reasonably well, I feel the need to correct some of the historical facts pertaining to Japan's Shogun era expressed by the video's cultural expert, Gaijin Goombah. Apologies if this information is already common knowledge, but, since no one has yet brought it up, I thought it might bear discussion.
The main error here is that the year given for Hideyoshi Toyotomi?s ?banning of Christianity? is 1857. Hideyoshi issued his directive to purge the Jesuits in 1587. This remarkable oversight of two and a half centuries obscures Hideyoshi's motives, rendering Gaijin Goombah's theory, that Hideyoshi considered Christian worship incompatible with reverence for the Emperor, as extremely flawed.
In truth, the Emperor as political expedient was a very Meiji, i.e. late nineteenth-century, idea, itself conceived by opportunistic samurai from Japan's southern provinces. Hideyoshi, who never formally accepted the mantle of "Shogun" and lived in an era of fragmented authority, would have been unlikely to behave in such a way. Rather, his actions reflected the more direct needs of his time: to put down the threat of armed rebellion, to end rumors of Japanese slave trading, and to limit the influence of foreign powers. His decree of 1587 did not ban Christianity outright, either, but merely expelled the Jesuits, only one of several types of missionaries active in Japan at the time. Even this edict was not widely observed, which may have led to Hideyoshi's more extreme statement of crucifying twenty-six Christians to put his message through.
Christianity *was* eventually outlawed in Japan, by Tokugawa Ieyasu, the founder of the Shogunate which brought an end to the Warring States Era. However, directly linking this ban to the dearth of Christians in modern Japan, as the video does, is problematic. It is more likely that Christianity's foreign values simply never took root in Japan, though, granted, they were never given much chance. A parallel can be seen in Japan's attitude towards socialism in the Meiji era. The oligarchic leaders of the time were fearful of socialism's potential impact on their power, and so took steps to discourage it, yet there was never any great outpouring of support for the movement to begin with. Its values were simply not popular at that juncture.
The above observations are meant to counter the simplistic notion that Christianity failed to flourish in Japan merely because "the Emperor forbade it," or that any decree would be so final or blindly followed as to utterly quash a religion for hundreds of years. This conceit carries the echoes of Western bias, the stereotype of a god-king suppressing his people and the ?one true faith.? The reality is somewhat more complex, human, and subtle.
As a final note, though quibbling with dates and technicalities may seem pedantic to some, it is important to recognize that Hideyoshi Toyotomi is one of the most prominent figures in Japanese history, a quintessential samurai and founding father, and were a Japanese author to casually assert that Americans owe their democracy to a bill passed by King Washington in 1492, they would almost certainly take exception.
EDIT: Since watching the segment again, I should note that Gaijin Goombah does address the cultural factors I mention throughout my post; in that respect, we are in agreement. My criticisms of his facts remain, as does my contention regarding his position on the Emperor, though I am pleased he chose to mute himself somewhat on this point with broader arguments.