「旧毛馬洗堰と旧毛馬閘門」遺構

Beneath the gaze of history, the Old Kema Weir and Lock stand as testaments to ingenuity and resilience. The structures are collectively known as the “Old Kema Weir and Lock Structure”. They were born from the Meiji-era flood control project, a key part of the Yodo River improvement works. Imagine the roaring waters of the Yodo River, a constant threat to the people of Osaka. The Meiji government, recognizing the need for change, embarked on a massive project to tame the river. The Old Kema Weir and Lock, designed by engineer Tadashi Okino, were crucial components of this ambitious undertaking. The Kema Weir, completed in January 1876, stretches 18.4 meters. It is constructed of brick and concrete, a testament to the innovative building techniques of the time. Its wing walls stand as sturdy guardians against the river’s might. The Kema First Lock, finished in August 1883, spans an impressive 105.7 meters. This lock, also made of brick and concrete, features a lock chamber, head section, and tail section. It was designed to facilitate boat navigation, ensuring smooth passage even when the weir controlled the water flow. These structures weren’t just functional. They were symbols of progress, representing Japan’s first large-scale hydraulic engineering project. They also marked the first time large-scale construction machinery was used in a Yodo River improvement project. The Old Kema Weir and Lock are more than just remnants of the past. They offer a glimpse into a pivotal moment in Japanese engineering history, a time when innovation and determination reshaped the landscape.