This video, titled "Domestic Cargo Vessel, Matsuura New Type "Shimakaze"｜Scaffolding Dismantling and Painting of the Hull｜(First and Second Coat of the Outer Panel to the First and Second Layer Below the Waterline)" (内航貨物船・松浦新船型 「しまかぜ」 足場解体～船体塗装作業⑤（外板一・二層目仕上げ塗装～水線下一・二層目塗装）（80）), was released by "matsuzo001." The video shows the process of dismantling scaffolding and painting the hull of the domestic freighter, "Shimakaze." Domestic freighters are only used for domestic cargo transport in Japan, and are not used for import and export from other countries. The use of white, blue, and red colors and the name "Shimakaze" make it easy to identify the ship as a Japanese ship, and you can feel the Japanese air that it gives off. This video shows the dismantling of scaffolding and the painting of the second layer of the Shimakaze, so if you're interested in ships, be sure to check it out!

This video, titled "Car Carrier and Passenger Ship (Ferry) Matsuura Shipyard's "No. 10 Kirikushi" at the front of the ship (vehicle deck)｜Block Loading - Leveling, Welding, etc. (Part 1)" (両頭型旅客船兼自動車航送船（フェリー）松浦造船所「第十きりくし」船最前方（車輌甲板）ブロック搭載状況～レベル出し・溶接作業等（前編）（11）), was released by "matsuzo001." This video shows how the blocks are loaded onto the new ship "No. 10 Kirikushi," the successor to No. 8 Kirikushi. The No. 10 Kirikushi is the second new ship after the Eighth Kirikushi, which was built in 2003, and has a history of being built in a headwind environment. Although it is the same type of ferry built at the same shipyard as Kirikushi No. 8, it was carefully built with the expectation that it would run for 30 years while reducing costs and delivery time. This video shows the leveling and welding process of No. 10 Kirikushi, so be sure to check it out.

This video is titled "The Completed Sanwa Repair Dock" (三和ドック、修繕船用大型ドック用大型ドック完成). It was released by "Nikkan News" (日刊工業ビデオニュース). The video shows the massive Sanwa Dock, that will be used specifically for repairing ships. This is a large-scale project with a total investment of more than 10 billion yen, and the completion of this large dock has made it possible to repair as many as 300 vessels per year. Sanwa Dock is a shipyard that focuses on repairing rather than building, so the project is expected to generate more profit than the investment. The video shows just how massive the Sanwa Dock is, so be sure to take a look if you're interested!

This video, titled "Removal of the Arase Dam｜30-Minute Version (For Specialists)" (荒瀬ダムの撤去　３０分版（一部専門家向け）), was released by "Kumamoto Prefecture Enterprise Bureau" (熊本県企業局). It shows the removal of the Arase Dam, which was built in Kumamoto Prefecture. The key point is that it introduces the history of the dam from the start of the power generation project to its removal. It also introduces the schedule and details of the removal work, which is perfect for those who want to learn more about the technicalities of dam removal. Of course, you don't have to be an expert on Japanese dams to enjoy the content. You can see rare scenes that you don't often see in daily life, so we recommend that you make time to watch it!

This video, titled "River construction by Komatsu Heavy Industries, CD110R" (コマツ重機による河川工事　 駆け巡るCD110R), was released by "OKはん." It shows the Uji River construction in December 2017. There are several heavy machines being used, but what is particularly eye-catching is the crawler dump truck running around in all directions without worry about the poor traction. Crawler dumpers can turn 360 degrees without having to change direction, so their movement is very smooth. The crawler dumper improves the efficiency of transporting on uneven or soft ground. This video shows how a crawler dump truck carries sand and soil scooped by an excavator out of a muddy area and onto land.

The Yatsuba Dam in Gunma Prefecture This video shows concrete being poured at the Yotsuba Damn in Gunma Prefecture. The Yatsuba Dam was originally planned in 1952 to protect Tokyo and the Tone River basin from floods caused by typhoons in the Agatsuma River, one of the major tributaries of the Tone River. However the project was abandoned due to water quality problems, lack of construction technology at the time, and anti-dam movements. After a long period of time to address these issues, construction of the dam began in 2015, and it was completed on March 31, 2020. The dam lake was named the "Yanba-Atsuma Lake" out of around 1,000 candidates from across the country. After years and years of waiting, the dam was finally completed. There's a roadside station and various tourist facilities around the Yatsuba Dam, so if you're in the area, be sure to stop by.

This video, titled Machi Blockbuilder Super Stone Dealer 2" (間知ブロック積み工スーパー石屋2), was released by "koronero2." You can see stacked blocks when you walk along roads and rivers. They've been used since the early 1950's as a substitute for natural stone blocks. Compared to other construction methods, it is cheaper and JIS-compliant, and it is also used for disaster recovery work. Machi-Blocks are smooth and shaped like a sake cup, which makes them easy to use in curved areas. There are several ways of stacking machi-blocks, but stacking them to create valley formations is the most common. One of the upsides of machi-blocks is that they can be stacked in different ways.