A picture taken on Dec. 8, 2018 shows the sand picture of Japan's old coin, Kanei Tsuho, of the Edo Period at a beach in Kannonji, Kagawa Prefecture. The oval-shaped coin measuring 90 meters from north to south and 122 meters from east to west looks complete circle when people look down from the 58.3-meter-high viewing platform. According to the city, it is said that people made it in one night to welcome their feudal lord Takatoshi Ikoma in 1633 and it is a lucky charm for good health and not being short of money. ( The Yomiuri Shimbun via AP Images )

A picture taken on Dec. 8, 2018 shows the sand picture of Japan's old coin, Kanei Tsuho, of the Edo Period at a beach in Kannonji, Kagawa Prefecture. The oval-shaped coin measuring 90 meters from north to south and 122 meters from east to west looks complete circle when people look down from the 58.3-meter-high viewing platform. According to the city, it is said that people made it in one night to welcome their feudal lord Takatoshi Ikoma in 1633 and it is a lucky charm for good health and not being short of money. ( The Yomiuri Shimbun via AP Images )

A picture taken on Dec. 8, 2018 shows the sand picture of Japan's old coin, Kanei Tsuho, of the Edo Period at a beach in Kannonji, Kagawa Prefecture. The oval-shaped coin measuring 90 meters from north to south and 122 meters from east to west looks complete circle when people look down from the 58.3-meter-high viewing platform. According to the city, it is said that people made it in one night to welcome their feudal lord Takatoshi Ikoma in 1633 and it is a lucky charm for good health and not being short of money. ( The Yomiuri Shimbun via AP Images )

A picture taken on Dec. 8, 2018 shows the sand picture of Japan's old coin, Kanei Tsuho, of the Edo Period at a beach in Kannonji, Kagawa Prefecture. The oval-shaped coin measuring 90 meters from north to south and 122 meters from east to west looks complete circle when people look down from the 58.3-meter-high viewing platform. According to the city, it is said that people made it in one night to welcome their feudal lord Takatoshi Ikoma in 1633 and it is a lucky charm for good health and not being short of money. ( The Yomiuri Shimbun via AP Images )

A picture taken on Dec. 8, 2018 shows the sand picture of Japan's old coin, Kanei Tsuho, of the Edo Period at a beach in Kannonji, Kagawa Prefecture. The oval-shaped coin measuring 90 meters from north to south and 122 meters from east to west looks complete circle when people look down from the 58.3-meter-high viewing platform. According to the city, it is said that people made it in one night to welcome their feudal lord Takatoshi Ikoma in 1633 and it is a lucky charm for good health and not being short of money. ( The Yomiuri Shimbun via AP Images )