OGA, Japan — The Japanese have long taken an easygoing, buffetlike approach to religion, ringing out the old year at Buddhist temples and welcoming the new year, several hours later, at Shinto shrines. Weddings hew to Shinto rituals or, just as easily, to Christian ones.
When it comes to funerals, though, the Japanese have traditionally been inflexibly Buddhist — so much so that Buddhism in Japan is often called “funeral Buddhism,” a reference to the religion’s former near-monopoly on the elaborate, and lucrative, ceremonies surrounding deaths and memorial services.
Read it all here. Substitute "Mainline Christianity" for "Buddhism" and "the US" for "Japan" and you get a remarkable coincidence.