At Minghai Beach in Japan, a massive coin-shaped pattern resembling ancient Chinese currency has been discovered, sparking numerous speculations. This three-dimensional coin pattern is formed from excavated sand, and it is only from a distance that one can truly appreciate its enormity. The center of the pattern features a square hole, surrounded by the inscription "Yong Kuan Tong Bao" in large characters. Measurements reveal that the pattern is actually oval-shaped, with a perimeter of 354 meters, a length of 122 meters from east to west, and a width of 90 meters from north to south.
There are two main theories regarding the formation of this coin pattern. One theory suggests that in 1633, during the tenth year of the Yong Kuan era, local residents excavated it overnight to welcome the lord of the Ryūmaru domain. The other theory dates back to 703 AD, during the third year of the Daibō era, when the deity Hachiman reportedly arrived in a glowing ship from Usa Shrine, leading the locals to construct this shrine in his honor.
This mysterious pattern evokes comparisons to the giant geoglyphs of Peru's Nazca Plain, fueling speculation about extraterrestrial involvement in its creation. Some even suggest that Hachiman may have been an alien, and that the glowing ship was a UFO. However, these hypotheses lack supporting evidence. Another perspective posits that the pattern was created by humans, potentially as a collective effort of ancient civilizations. It is speculated that a leader, standing on Qinban Mountain, directed workers on the beach using flag signals to complete this monumental project.
Despite these theories, the true origin of the coin pattern remains uncertain, including who created it, for what purpose, when it was made, and how it has managed to endure beneath the waves of the ocean without disappearing.
