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Okochi Lab
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A lab that investigates air and water pollutants to detect abnormalities in the global environment at an early stage.
AboutAbout the lab
Exploring the future of the Earth and people through the chemistry of air and water
The Okochi Lab investigates the actual state of pollutants in the air and water in order to detect changes in the global environment at an early stage.
Based on observations at Mt. Fuji and in Shinjuku, it studies transboundary air pollution and the movement of microplastics in the atmosphere.
It also studies the effects of air pollutants and radioactive materials on ecosystems, focusing on forests and satoyama (rural woodland areas near villages).
Key terms
- Microplastics
- Extremely small plastic particles formed when plastic waste and other items break down.
- Transboundary air pollution
- Air pollution carried by wind across national borders to other countries or regions.
- Volatile organic compounds (VOCs)
- Carbon-containing chemicals that evaporate easily at room temperature. They are one cause of air pollution.
NewsLab news
Professor Okochi receives the Technology Award from the Japan Society for Atmospheric Environment
Professor Okochi receives the AJAE Paper Award from the Japan Society for Atmospheric Environment
A master's student receives the Outstanding Student and Young Researcher Presentation Award (Oral Presentation Category) from the Japan Society for Atmospheric Environment
Doctoral and master's students receive the SETAC Japan Award from the Japan Society for Environmental Chemistry
An undergraduate student receives the Cambridge Isotope Laboratories Award from the Japan Society for Environmental Chemistry
ResearchResearch themes
The Okochi Lab studies the amounts of pollutants released into the environment and the pathways by which they move.
*Illustrative imageUnderstanding How Heavy Rain Forms
Using atmospheric and precipitation observations in mountainous areas and Cambodia, the lab investigates how localized torrential rain forms and how air pollutants affect heavy rainfall.
*Illustrative imageMicroplastics Surveys
The lab investigates the actual state of microplastics on land, in the air, and in everyday products, and assesses their effects on health and the environment.
*Illustrative imageEnvironmental Impacts on Forests and Satoyama
The lab studies the movement of volatile organic compounds emitted by forests and the actual state of radioactive materials that have fallen and accumulated in satoyama, and works on developing technologies for cleaning up the environment.
*Illustrative imageWater Quality Surveys of Mountains and Rivers
Targeting fog that reaches forests, clouds on Mt. Fuji, and stream water in Tanzawa, the lab studies how pollutants carried from the atmosphere affect water quality and ecosystems.
MembersFaculty
The members of the Okochi Lab consist of faculty and master's and undergraduate students.As of 2026
- ProfessorHiroshi Okochi
- Assistant ProfessorYize Wang
VoicesStudent voices
Compiled from answers by students who were in the lab. Ratings and reviews reflect individual students' experiences, not the lab's official views.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
On a 4-point scale, ● marks where students' answers fall
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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: “ISS-46 Mount Fuji, Japan” NASA/Scott Kelly / Public domain (cropped)
- Understanding How Heavy Rain Forms: “Heavy Rain ( )” Robin Férand / CC BY 3.0 (cropped)
- Microplastics Surveys: “Mikroplastasarp” Dantor / CC BY-SA 3.0 (cropped)
- Environmental Impacts on Forests and Satoyama: “Impressive bamboo canopy (Unsplash)” Jason Ortego / CC0 (cropped)
- Water Quality Surveys of Mountains and Rivers: “Mountain Stream with Moss-Covered Boulders” Teame01 / CC BY-SA 4.0 (cropped)
- Related lab (Itsubo Lab): “Whole world - land and oceans 12000” NASA/Goddard Space Flight Center / Public domain (cropped)
- Related lab (Kawabe Lab): “Berkeley Pit & Continental Mine & Yankee Doodle Tailings Pond (Butte, Montana, USA)” James St. John / CC BY 2.0 (cropped)
- Related lab (Nozaki Lab): “Active hydrothermal vent- Mushroom (OOI 222)” Ocean Observatories Initiative / Public domain (cropped)
- Related lab (Ouchi Lab): “Oil pump in Baku” Gulustan / CC BY-SA 3.0 (cropped)
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