We study environmental measures related to soil, water, and the atmosphere to maintain and preserve the soil-related cycles in a healthy state. By theoretically analyzing results obtained from field surveys and experiments, we clarify the mechanisms governing the transport and accumulation of pollutants and explore strategies for soil remediation and pollution prevention.

1. Transport and Accumulation of Pollutants in Soil
   We investigate the mechanisms by which pollutants such as heavy metals, radioactive substances, and microplastics are transported and accumulated in soil, and examine countermeasures for soil contamination. We also explore water purification techniques that utilize the natural purification capacity of soils.

2. Mitigation of Greenhouse Gas Emissions from Agricultural Land
   We observe the generation and movement of greenhouse gases—particularly carbon dioxide, methane, and nitrous oxide—from agricultural fields and study methods to mitigate their emissions.

3. Soil Carbon Sequestration Using Crushed Basalt
   Technologies for carbon sequestration using rock weathering have attracted increasing attention. We investigate carbon dynamics in soils amended with crushed basalt and assess the effectiveness of this approach for agricultural land.

4. Movement of Soil Materials in Sloped Farmland
   We analyze the movement patterns of water, solutes, and even soil itself on sloped agricultural land, and consider soil management practices that support stable agricultural production.

5. Migration of Radioactive Substances in Soil Environments and Farmland Contamination
   Focusing on radioactive cesium and radioactive microparticles originating from the Fukushima nuclear accident, we elucidate their behavior in soil environments and their transfer to farmland and crops.