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Hoshino Lab
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The lab traces the flow of iron and aluminum through society to study how resources can be circulated.
AboutAbout the lab
Following the life of metals toward sustainable resource circulation.
Hoshino Lab studies the flow in which foundational materials such as iron, aluminum, and copper are produced, used, discarded, and recycled in society.
The lab develops methods to analyze and evaluate environmental burden and resource issues across the life cycle of materials.
It also predicts the impurities that accumulate through recycling, and which metals may face shortages in a decarbonized society.
The lab aims to connect its research results to advice for industry and to policy recommendations.
Key terms
- Foundational materials
- Materials such as iron, aluminum, and copper that support large structures like bridges, as well as automobiles and power plants
- Material flow analysis
- A method for quantifying how much of a material enters, leaves, and circulates within a country or region
- Life cycle assessment
- A method for evaluating the environmental burden of a material or product from production through disposal and recycling
ResearchResearch themes
The lab analyzes the life cycle of foundational materials, including steel, from production to recycling, and develops methods to analyze and evaluate global environmental and resource problems. Based on life cycle assessment and material flow analysis, it explores directions that optimize resource circulation.
*Illustrative imageMaterial flow analysis including recycling
The lab estimates in detail, by alloy type, how much metal is used, collected, and reused. It develops analytical methods that can be applied not only to steel but also to copper and aluminum.
*Illustrative imagePredicting impurities that accumulate through recycling
When metal scrap is collected, mixing with other materials is unavoidable. Using mathematical models, the lab predicts how elements that cannot be removed once mixed in become more concentrated with each round of recycling.
*Illustrative imageEnvironmental impact assessment that accounts for recycling
After analyzing material flows, the lab evaluates the environmental burden across the life of materials, especially carbon dioxide emissions. It has developed an evaluation method that takes metal recycling into account.
*Illustrative imageStable metal supply in the decarbonization era
Copper, nickel, cobalt, and other metals that are essential for electric vehicles and renewable power generation may become harder to obtain. The lab studies methods to evaluate the supply risk of each metal.
MembersFaculty
The members of Hoshino Lab consist of faculty, secretaries, and master's and undergraduate students.As of 2025
- Project ProfessorTakeo Hoshino
- Project Assistant ProfessorKentaro Takeyama
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “CompactedSteelScraps” Rotor DB / CC BY-SA 3.0 (cropped)
- Material flow analysis including recycling: “SHREDDED STEEL LOADED ON RAILWAY CARS. (FROM THE DOCUMERICA-1 EXHIBITION. FOR OTHER IMAGES IN THIS ASSIGNMENT, SEE... - NARA - 553012” William C. Shrout / Public domain (cropped)
- Predicting impurities that accumulate through recycling: “Steel recycling bales” blahedo / CC BY-SA 2.5 (cropped)
- Environmental impact assessment that accounts for recycling: “20210925 Steel plant Dillingen Saar 02” Flocci Nivis / CC BY 4.0 (cropped)
- Stable metal supply in the decarbonization era: “Copper cathode from copper starter sheets” Xstrata Technology / CC BY-SA 3.0 (cropped)
- Related lab (Daigo Lab): “CompactedSteelScraps” Rotor DB / CC BY-SA 3.0 (cropped)
- Related lab (Watanabe Lab): “Scanning Tunneling Microscope Structure ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Yoshida Lab): “Superabsorber Hydrogel KSG 2917 pK” Petra Klawikowski / CC BY-SA 3.0 (cropped)
- Related lab (Mizoguchi Lab): “Aluminium Atomic lattice” Matheustunes / CC BY-SA 4.0 (cropped)
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