The most expensive fruit in the world is the Japanese Yubari melon, which can cost up to $30,000 per pair. These melons are grown in a small region of Japan and are known for their sweetness, juiciness, and perfect round shape. The high price is due to the meticulous and labor-intensive process of growing and harvesting them, as well as their limited availability. The Yubari melon is often given as a luxurious gift, and it has become a symbol of status and prestige in Japan.