01 / Korokan Site
A dig for a stadium renovation confirmedthe remains of an ancient guest hall.

Korokan (鴻臚館) was an ancient guest hall for welcoming foreign visitors. It was set up in three places, Heian-kyo, Naniwa and Tsukushi, and the city explains that remains have been confirmed only in Fukuoka. In December 1987 an excavation linked to renovating Heiwadai Baseball Stadium confirmed the remains, and the site was designated a National Historic Site in 2004.
- Remains from five phases, late 7th to mid-11th century
- Excavation for the stadium renovation, December 1987
- National Historic Site (designated 2004)

