This is a limited edition amulet from the Kanja Suijin Shrine in Iwanuma City, Miyagi Prefecture, available only on the Day of the Snake (己巳の日). The Day of the Snake comes only once every 60 days, making this amulet very difficult to obtain. The Day of the Snake (Tsuchinoto-mi) refers to the day when the "Snake" of the twelve zodiac signs and the "Tsuchinoto" of the ten celestial stems coincide. It is a special day for Benzaiten, and a powerful day for good luck as the snake, her messenger, is believed to deliver wishes. Kanja Suijin Shrine enshrines a god of financial fortune and is a power spot visited by many people from all over the country, not just within the prefecture. As the snake is the object of worship, it has been widely believed since ancient times that this deity grants wishes for business prosperity, financial well-being, warding off evil, good health, as well as maritime safety and abundant catches.