Ключевые слова: asian dragon, attractions, concrete, disaster, disaster prevention, drainage, earths core, edogawa, facilities, field trips, flood, flood damage, harmonic pressure tank, heavy rain, heavy rains, japan, kasukabe, kasukabeshi, landscape, natural disaster, outer underground discharge channel, rain, rain water, river, saitama, saitama prefecture, spillway, study tours, tokyo metropolitan area, torrential rain, tour, tourism, tourist attractions, tourist destination, travel, typhoon, underground, underground drains, underground facilities, underground temple, underground tunnel, underground water road, water, water reservoir, water storage facility,