Chapter 56
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Nobunaga Tsutsumi
Nobunaga, who had brought Owari and Mino under his control, faced a problem as a result of ruling over vast lands. That problem was floods. The Kiso Three Rivers (Kiso River, Nagara River, and Ibi River) had long been plagued by devastating floods, causing frequent damage. Even a protective embankment, known as “Okakoi tsutsumi,” was built on the left bank of the Kiso River under the orders of Tokugawa Ieyasu, highlighting the long-standing issue of water disasters. In the past, Nobunaga may not have paid much attention to floods, but now he considered control over waterways to be important.
If one simply monopolizes water resources with brute force, there will be a strong backlash. It is difficult for people to argue against it, so one must present a plausible justification while secretly gaining control over water resources. Water is the most crucial lifeline, and by controlling water resources, one can have complete control over the life and death of the subjects. Nobunaga concludes that constructing embankments to prevent water disasters and monopolizing power while being appreciated by the subjects is the best strategy.
However, it would require a huge amount of funds and time to build a dam and embankment. Furthermore, there was also a problem with the materials. Nobunaga spent several days thinking about whether there was a solution that could solve everything at once, but he couldn’t come up with a clever plan. Just when he was about to give up and focus only on the important points, a flash of inspiration, almost like a divine revelation, came to his mind.
“If that’s the case… then we can solve the problem with resources, time, and money.”
The answer that came to mind is to use concrete. Specifically, it involves using concrete for the framework and then covering it with soil or gravel to build the embankment.
First, create several reservoirs in the upstream area. By creating reservoirs, it is possible to constantly supply stable water regardless of the rainy season or dry season. Once that is done, proceed with embankment construction. All embankments must have the strength to withstand the maximum flow of the river.
Here, Nobunaga made a plan to use concrete for the embankment. First, rectangular concrete blocks are made near the location where the embankment will be installed. Although they are called blocks, they weigh close to 100 kilograms and are more like chunks of rock. This will serve as the foundation for the embankment and also as a work area. After that, the blocks are stacked up until they reach a height where the water from the river does not overflow, and then concrete is poured directly to form the shape. A concrete wall is built up to the required height, and on top of that, green concrete is used, mixed with perlite and a mixture of soil for landscaping. Finally, weeds and trees for the landscape are planted, and the embankment is completed.
If it’s concrete, it would be cheaper to use rocks to build river embankments. By covering them with green concrete, the embankments can blend into the surrounding landscape. People can use their own soldiers, and if they dispatch Shizuko’s unit, which is trained as engineers, as the commanding officer, it would be good.
Nobunaga incorporated the large-scale development of the Nobi Plain, which was further formed by the Kiso Three Rivers, into his river embankment plan. He efficiently developed the land and transformed Owari and Mino into leading productive regions. Goods were transported using the waterways of the Kiso Three Rivers, and for land transportation, horse-drawn carriages were set up to transport goods to necessary locations.
Once the development of reservoirs, embankments, and the Nobi Plain in the upper reaches is completed, only the lower reaches will remain. The lower reaches of the Kiso Three Rivers have a long history of battling against floods. The Nagara River, Kiso River, and Ibi River flow in a network pattern, constantly changing their shape with each flood. The Oi River Embankment is a large embankment that stretches about 50 kilometers along the left bank of the Kiso River. Nobunaga primarily had military purposes in mind, such as monopolizing the rights to water transportation routes, defending against floods, and preventing invasion by forces from the western regions. He also considered the complete diversion of the Kiso Three Rivers.
The completed drawing depicted in Nobunaga’s plan coincidentally had the same shape as the lower reaches of the modern Kiso Sanzan River. Whether this was Nobunaga’s intention or if he simply copied the map he received from Shizuko is unclear. Nevertheless, his plan concluded with the completion of the river improvement project in the lower reaches of the Kiso Sanzan River.
It is believed to be the largest flood control project of the Sengoku period, which is expected to take a hundred years to complete. However, for the people living in this area, flood control is a long-cherished desire, and since major settlements and markets were concentrated on the western side of Owari, many people supported Nobunaga’s policies. However, they were unaware of Nobunaga’s true intentions. His real aim was to gain control of the Ise Bay, to bring the areas like Ise Chōshima under his rule, and to eliminate the power of the Honganji faction.
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Nobunaga Tsutsumi
Nobunaga, who had brought Owari and Mino under his control, faced a problem as a result of ruling over vast lands. That problem was floods. The Kiso Three Rivers (Kiso River, Nagara River, and Ibi River) had long been plagued by devastating floods, causing frequent damage. Even a protective embankment, known as “Okakoi tsutsumi,” was built on the left bank of the Kiso River under the orders of Tokugawa Ieyasu, highlighting the long-standing issue of water disasters. In the past, Nobunaga may not have paid much attention to floods, but now he considered control over waterways to be important.
If one simply monopolizes water resources with brute force, there will be a strong backlash. It is difficult for people to argue against it, so one must present a plausible justification while secretly gaining control over water resources. Water is the most crucial lifeline, and by controlling water resources, one can have complete control over the life and death of the subjects. Nobunaga concludes that constructing embankments to prevent water disasters and monopolizing power while being appreciated by the subjects is the best strategy.
However, it would require a huge amount of funds and time to build a dam and embankment. Furthermore, there was also a problem with the materials. Nobunaga spent several days thinking about whether there was a solution that could solve everything at once, but he couldn’t come up with a clever plan. Just when he was about to give up and focus only on the important points, a flash of inspiration, almost like a divine revelation, came to his mind.
“If that’s the case… then we can solve the problem with resources, time, and money.”
The answer that came to mind is to use concrete. Specifically, it involves using concrete for the framework and then covering it with soil or gravel to build the embankment.
First, create several reservoirs in the upstream area. By creating reservoirs, it is possible to constantly supply stable water regardless of the rainy season or dry season. Once that is done, proceed with embankment construction. All embankments must have the strength to withstand the maximum flow of the river.
Here, Nobunaga made a plan to use concrete for the embankment. First, rectangular concrete blocks are made near the location where the embankment will be installed. Although they are called blocks, they weigh close to 100 kilograms and are more like chunks of rock. This will serve as the foundation for the embankment and also as a work area. After that, the blocks are stacked up until they reach a height where the water from the river does not overflow, and then concrete is poured directly to form the shape. A concrete wall is built up to the required height, and on top of that, green concrete is used, mixed with perlite and a mixture of soil for landscaping. Finally, weeds and trees for the landscape are planted, and the embankment is completed.
If it’s concrete, it would be cheaper to use rocks to build river embankments. By covering them with green concrete, the embankments can blend into the surrounding landscape. People can use their own soldiers, and if they dispatch Shizuko’s unit, which is trained as engineers, as the commanding officer, it would be good.
Nobunaga incorporated the large-scale development of the Nobi Plain, which was further formed by the Kiso Three Rivers, into his river embankment plan. He efficiently developed the land and transformed Owari and Mino into leading productive regions. Goods were transported using the waterways of the Kiso Three Rivers, and for land transportation, horse-drawn carriages were set up to transport goods to necessary locations.
Once the development of reservoirs, embankments, and the Nobi Plain in the upper reaches is completed, only the lower reaches will remain. The lower reaches of the Kiso Three Rivers have a long history of battling against floods. The Nagara River, Kiso River, and Ibi River flow in a network pattern, constantly changing their shape with each flood. The Oi River Embankment is a large embankment that stretches about 50 kilometers along the left bank of the Kiso River. Nobunaga primarily had military purposes in mind, such as monopolizing the rights to water transportation routes, defending against floods, and preventing invasion by forces from the western regions. He also considered the complete diversion of the Kiso Three Rivers.
The completed drawing depicted in Nobunaga’s plan coincidentally had the same shape as the lower reaches of the modern Kiso Sanzan River. Whether this was Nobunaga’s intention or if he simply copied the map he received from Shizuko is unclear. Nevertheless, his plan concluded with the completion of the river improvement project in the lower reaches of the Kiso Sanzan River.
It is believed to be the largest flood control project of the Sengoku period, which is expected to take a hundred years to complete. However, for the people living in this area, flood control is a long-cherished desire, and since major settlements and markets were concentrated on the western side of Owari, many people supported Nobunaga’s policies. However, they were unaware of Nobunaga’s true intentions. His real aim was to gain control of the Ise Bay, to bring the areas like Ise Chōshima under his rule, and to eliminate the power of the Honganji faction.
Nobunaga TsutsumiNobunaga, who had brought Owari and Mino under his control, faced a problem as a result of ruling over vast lands. That problem was floods. The Kiso Three Rivers Kiso River, Nagara River, and Ibi River had long been plagued by devastating floods, causing frequent damage. Even a protective embankment, known as Okakoi tsutsumi, was built on the left bank of the Kiso River under the orders of Tokugawa Ieyasu, highlighting the long-standing issue of water disasters. In the past, Nobunaga may not have paid much attention to floods, but now he considered control over waterways to be important.If one simply monopolizes water resources with brute force, there will be a strong backlash. It is difficult for people to argue against it, so one must present a plausible justification while secretly gaining control over water resources. Water is the most crucial lifeline, and by controlling water resources, one can have complete control over the life and death of the subjects. Nobunaga concludes that constructing embankments to prevent water disasters and monopolizing power while being appreciated by the subjects is the best strategy.However, it would require a huge amount of funds and time to build a dam and embankment. Furthermore, there was also a problem with the materials. Nobunaga spent several days thinking about whether there was a solution that could solve everything at once, but he couldn't come up with a clever plan. Just when he was about to give up and focus only on the important points, a flash of inspiration, almost like a divine revelation, came to his mind.If that's the case then we can solve the problem with resources, time, and money.The answer that came to mind is to use concrete. Specifically, it involves using concrete for the framework and then covering it with soil or gravel to build the embankment.First, create several reservoirs in the upstream area. By creating reservoirs, it is possible to constantly supply stable water regardless of the rainy season or dry season. Once that is done, proceed with embankment construction. All embankments must have the strength to withstand the maximum flow of the river.Here, Nobunaga made a plan to use concrete for the embankment. First, rectangular concrete blocks are made near the location where the embankment will be installed. Although they are called blocks, they weigh close to 100 kilograms and are more like chunks of rock. This will serve as the foundation for the embankment and also as a work area. After that, the blocks are stacked up until they reach a height where the water from the river does not overflow, and then concrete is poured directly to form the shape. A concrete wall is built up to the required height, and on top of that, green concrete is used, mixed with perlite and a mixture of soil for landscaping. Finally, weeds and trees for the landscape are planted, and the embankment is completed.If it's concrete, it would be cheaper to use rocks to build river embankments. By covering them with green concrete, the embankments can blend into the surrounding landscape. People can use their own soldiers, and if they dispatch Shizuko's unit, which is trained as engineers, as the commanding officer, it would be good.Nobunaga incorporated the large-scale development of the Nobi Plain, which was further formed by the Kiso Three Rivers, into his river embankment plan. He efficiently developed the land and transformed Owari and Mino into leading productive regions. Goods were transported using the waterways of the Kiso Three Rivers, and for land transportation, horse-drawn carriages were set up to transport goods to necessary locations.Once the development of reservoirs, embankments, and the Nobi Plain in the upper reaches is completed, only the lower reaches will remain. The lower reaches of the Kiso Three Rivers have a long history of battling against floods. The Nagara River, Kiso River, and Ibi River flow in a network pattern, constantly changing their shape with each flood. The Oi River Embankment is a large embankment that stretches about 50 kilometers along the left bank of the Kiso River. Nobunaga primarily had military purposes in mind, such as monopolizing the rights to water transportation routes, defending against floods, and preventing invasion by forces from the western regions. He also considered the complete diversion of the Kiso Three Rivers.The completed drawing depicted in Nobunaga's plan coincidentally had the same shape as the lower reaches of the modern Kiso Sanzan River. Whether this was Nobunaga's intention or if he simply copied the map he received from Shizuko is unclear. Nevertheless, his plan concluded with the completion of the river improvement project in the lower reaches of the Kiso Sanzan River.It is believed to be the largest flood control project of the Sengoku period, which is expected to take a hundred years to complete. However, for the people living in this area, flood control is a long-cherished desire, and since major settlements and markets were concentrated on the western side of Owari, many people supported Nobunaga's policies. However, they were unaware of Nobunaga's true intentions. His real aim was to gain control of the Ise Bay, to bring the areas like Ise Chshima under his rule, and to eliminate the power of the Honganji faction.
