Ingeniería Hidráulica en Japaní Lima, Perú Hydraulic Engineering in Japani Good morning, We are in the ancient community of Japani in the province of Huarochiri, department of Lima. It has been dated to more than 500 years, at about the time of the Spanish Conquest. We are standing in the Main Plaza of the community of Japani you can see that it is a large plaza where the inhabitants of the time got together to decide the destiny of the community. Here you can see where the Chief would sit. At this time I am going to sit in the place of the chief of Japani You can observe the size of this Inca settlement probably, we could say, Pre-Inca. It is estimated that in these surroundings there is about 200 buildings. This watershed drains to a river which is below here, which is tributary of the Santa Eulalia river, itself a tributary of the Rimac river. We are now inside one of the houses of Japani as you can see the houses are up to two stories. I think we could say without exaggeration that we are in the Machu Picchu of the province of Huarochiri, department of Lima, Peru. As you can see this community was dedicated to agriculture primarily by building terraces in this area of the Western Andes which is so rugged. Here we can see, in perspective, the reservoir of Japani, which the ancient inhabitants of this region built for the purpose of storing water to irrigate the lower lands.