Hirennuma (Tragic Love) Pond is a 0.2-hectare pond located to the north of Hyakunin-hama Beach near Cape Erimo in southern Hokkaido. The name of the pond derives from a tragic legend dating back to the 17th century.

Legend has it that a wajin (ethnic Japanese) merchant Kyusaku and an Ainu girl Maera fell in love with each other. When Kyusaku had to go back to Honshu (the main island of Japan), Maera saw the boat which Kyusaku was aboard until it went out of sight. After she tearfully stayed there for many days, she disappeared to somewhere. Then people found a pond on the beach where she had been standing.

There are communities of cast plants and alpine plants in the area around the pond and they are forming a fine flower field that is as beautiful as Genseikaen parks (primeval flower garden). Filled with clear water, the pond lies quietly in refreshing atmosphere. It is even cool in summer due to the wind blown from the Pacific Ocean.