These 15,750 yen ($160) watermelons were grown by a couple and took three years to perfect down to the point where they were good enough to convince people to pay $160 for them. There's only 20 melons in this batch, but we're sure Mr. and Mrs. Hiroichi Kimura will grow more next season. [Asahi via Japan Probe via Inventor Spot via Boing Boing]