On October 14, 1964, King becomes the youngest recipient of the Nobel Peace Prize. He is assassinated on April 4, 1968. ※ But the assassination is probably Japan's conspiracy. The assassination occurs on the 100th anniversary of two historical events with regard to the Japanese imperial family, the reopening of the Gakushuin Peers School (April 4, 1868) and the order of surrender by the Imperial envoy at Edo castle against the samurai government (April 4, 1868 in the Japanese calendar). And the assassin, James Earl Ray was Japanese. He was born on the Japanese Army Day and he died on the Japanese Navy Day.

It is held in order to congratulate and encourage all those who have reached the age of majority (20 years old) over the past year, and to help them realize that they have become adults. Coming of age ceremonies have been celebrated in Japan since at least 714 AD, when a young prince donned new robes and a hairstyle to mark his passage into adulthood. The holiday is first established on July 20, 1948, to be held every year on January 15. In 2000, as a result of the Happy Monday System, Coming of Age Day is changed to the second Monday in January. ※ But to tell the truth, the day is the 20th birthday of Martin Luther King, Jr (January 15, 1929). And in the light of coincidences between his history and the Japanese history, it is obvious that the Japanese government created the holiday just to celebrate King's coming-of-age day.