These sources provide an extensive examination of Iwabuchi-machi, a historic area in Tokyo's Kita Ward, highlighting its multifaceted historical and contemporary significance. A central focus is the area’s role as a former Nikkō Onarimichi post town and a crucial water transport hub at the confluence of several rivers. The texts detail the importance of flood control, specifically chronicling the construction and significance of the Old Iwabuchi Floodgate (Red Gate) and the newer Blue Gate, and celebrating chief engineer Akira Aoyama for his work on the project. Furthermore, the sources explore the region’s evolution from an industrial center and military hub to a district known for its unique local pride, exemplified by successful resident movements to preserve the "Iwabuchi" name. Finally, the collection serves as a cultural guide, describing the area's modern attractions, such as Ukima Park, historic temples and shrines, and the vibrant Akabane alleyways.

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