Shibusawa Eiichi
With the modernization of Japan in the Meiji period, many of the mounds disappeared through road-widening and construction schemes, and the survival of both is now rare. Of "ichirizuka" that are still extant, sixteen have been designated for protection as national Historic Sites. Of the two within Tokyo, that at Nishigahara was once threatened by a road-widening project; a movement to save it led by industrialist Shibusawa Eiichi, the "father of Japanese capitalism", is commemorated in a monument beside what is now . ()