Japanese people choose this kind of ceremony, of course, it is not forced on them. During the colonial era some European powers tried to replace native cultures with their own, not least here in Ireland; this was a more direct and aggressive cultural imperialism.
"Western cultural imperialism" is used to describe both the popular spread of Hollywood throughout the world and the violent imposition of culture by colonists. But perhaps the single most destructive example of Western cultural imperialism was perpetrated not by Europeans, but by the Chinese.
Today "Western" is usually meant to imply social democratic/capitalist mixed states, with strong emphasis on secularism, individualism and free speech. Why? Nazism arose in Germany. Fascism started in Italy. Karl Marx and Frierich Engels were both German - Communism first took root in Russia; collectivism, Communism, hyper-nationalism and censorship all fit comfortably within "Western" values when we include the radical 20th century ideologies that also developed in Europe.
If Communism is Western, the Communist devestation of Chinese cultural artefacts during the Cultural Revolution must be one of the worst cases of Western cultural imperialism of all time.
The Communists turned on all other ideologies, including native Chinese belief systems like Taoism and Confucianism.
The Red Guard and supporters of the Cultural Revolution also destroyed temples and historical buildings. Between 1970 and 1974 an army unit stationed at Gubeikou tore down two miles of the Great Wall and used the stone blocks to construct army barracks. In Tibet the Red Guard turned thousand-year-old monasteries into factories and pigsties.... They ripped crosses from church steeples, forced Catholic priests into labor camps, tortured Buddhist monks in Tibet and turned Muslim schools into pig slaughterhouses. Taoists, Buddhists and Confucians were singled out as vestiges of the Old China that needed to be changed.
Odd, then, that today China is sometimes depicted as an alternative to, or rival of "the West", while Japan (where no such violent destruction of indigenous culture took place) is seen as an ally. Communism is as Western an idea as Japan's social democracy, and radical Communism of 1960s China attempted to replace traditional Chinese culture with a radical ideal from 19th century Germany. The Cold War was never about West and East, but rather the West and the Other West.