Kanenokuma ruin is a 'funbo-iseki' (tomb ruin) located in Hakata-ku, Fukuoka-shi, Fukuoka Prefecture. It is sited on a 30m-high hill. So far, 348 'kamekanbo' (burials in large jars), 119 'dokobo' (burials directly into the ground) and 'mokanbo' (burials in wooden coffins), as well as 2 'sekikanbo' (burials in stone coffins) have been found here.

A huge amount of kamekanbo were children, indicating that this was the preferred form of burial for children. Many bodies reveal the custom of tooth extraction. Across 400 years, from about 200BC to 200AC, the Yayoi people used this burial site as a public graveyard. It can also be seen that it was a graveyard specifically for common Yayoi people, because no riches such as mirrors were found with the bodies, showing that no people of power were buried here.

Today, Kanenokuma ruin is an historic park. Many of the coffins, including dokobo and kamekanbo, are exhibited in a specially constructed building over the site and in the same condition where excavation has taken place. In 1972, Kanenokuma ruin was designated as an historic site of Japan.