The , also referred to as the Moro archaeological site, is a Paleolithic archaeological site located within Jà Âhoku-Chà «à  Park in Itabashi Ward, Tokyo, Japan. It is known for the discovery of stone tools dating to the Japanese Paleolithic period.
In March 1951, a junior high school student, , who later became an archaeologist, discovered obsidian stone tools and clusters of pebbles in a road cutting through a hill known as . A joint excavation was conducted by Meiji University and the Musashino Museum in July of the same year.
This investigation was one of the earliest studies of the Japanese Paleolithic in the Kantà  region, following research at the Iwajuku site in Gunma Prefecture. The findings demonstrated that Paleolithic culture, predating the Jà Âmon period, was present across the Japanese archipelago. A distinctive type of knife-shaped stone tool discovered at the site was later named the .
The excavated assemblage includes burins, side-scrapers, lithic flakes, and backed points. The site was designated a historic site of Tokyo in 1969 and of Itabashi Ward in 1984. In 1999, 22 excavated stone tools were designated as tangible cultural properties of Tokyo.
The site is located within Jà Âhoku-Chà «à  Park, a large public park spanning parts of Itabashi and Nerima wards in Tokyo. It lies in a wooded area of the park and is not accessible to the public in order to protect the site. A stone marker and information boards indicate its location.