Ubayama Kaizuka (Shell Mound) Park

This park was made from a preserved horseshoe-shaped shell mound originating from the mid- to late Jomon Period.  The shell mound is approximately 200 m tall and wide. 

 

This vertical residence from the Jomon Period was discovered in 1924 by the Tokyo Anthropological Association, and was the first site of its kind discovered in Japan.  It is a nationally designated historical site.