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Extending MSD Period In Chugoku/Shikoku Paddy Rice Cultivation

In flooded rice paddies, the low oxygen levels lead to anaerobic decomposition of materials like rice straw and compost in the soil, resulting in the emission of methane gas. This greenhouse effect is estimated to be 28 times more potent than carbon dioxide. The project involves extending the 'mid-season drainage' period during rice cultivation by 7 days longer than usual, reducing the emission of greenhouse gases by 30%.





30 ha.





Forward Contract Available

Credits Available

139 ~ credits

About this Project

Project Description

In the mid-mountainous area, characterized by its rich natural environment and temperature variations, it produces rice with good grains while maintaining the nostalgic rural scenery. The paddy fields located in the hilly and mountainous areas have a smaller area compared to the plains, leading to challenges with weeds and animals in the surrounding area. This project aims to contribute to the revitalization of rural areas and establish an innovative model that leverage the advantages of small-sized rice paddies by extending the mid-drying period by additional 7 days beyond conventional practice.

Organic matter present in water-filled paddy fields, such as rice straw and compost, emits large amounts of methane through anaerobic decomposition by methanogens. Methane is a potent greenhouse gas with 28 times the global warming potential of carbon dioxide. Research has indicated that mid-drying, a management practice that removes water from rice fields once during cultivation, can reduce methane emissions. This is because mid-drying introduces oxygen into the soil, inhibiting the anaerobic decomposition of organic matter. A national agency proposed extending the mid-drying period by 7 days to reduce methane emissions by 30% through a shorter anaerobic decomposition period. However, extending the mid-drying period has the risk of causing a shortage of rice because it stops the growth of rice. Therefore, it is necessary to carefully grasp the growing condition of rice before implementing this methodology.

A feature of the project in this region is the small size of paddy fields due to the hilly and mountainous terrain, which results in a larger number of water intakes and drains to be managed for the mid-drying process compared to the cultivated area. This particular aspect requires significant effort and attention. However, by managing through careful observations and judgments at the optimal timing, it becomes possible to achieve a balance between crop production and environmental load reduction. We will also conduct a biosurvey of paddy fileds, monitor the yield, and quality of the crops to see if the extension of the mid-drying process has an adverse effect. This is a progressive project that considers the impact on the surrounding environment and food production.


Fields involved in this project


Yamaguchi, Japan​


Yamaguchi, Japan​


Calculating GHG Reduction

Image by Sergio Camalich

Rice Field Practice


Measuring Ecological Impact

Image by Sergio Camalich

Soil Health


Measuring Ecological Impact

Image by Sandy Ravaloniaina

Harvest Quality


Additional Info

Additional information related to this project

Offset Generation Method

Emission Reduction

Project Type


Project Start Date


Project End Date



Documents related to this project

Project Design Document

Monitoring Report

Not Submitted

Issuance Certificate

Not Submitted

Carbon Offset Certificate

Not Submitted


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