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Global monthly 1-km rice yield mapping for attributing the impacts from extreme weather events

Research Project

Project/Area Number 22H00577
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 64:Environmental conservation measure and related fields
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

Iizumi Toshichika  国立研究開発法人農業・食品産業技術総合研究機構, 農業環境研究部門, 上級研究員 (60616613)

Co-Investigator(Kenkyū-buntansha) 酒井 徹  国立研究開発法人国際農林水産業研究センター, 社会科学領域, 主任研究員 (40401278)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥19,760,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥4,560,000)
Fiscal Year 2024: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2022: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywordsコメ収量 / 全球グリッドデータ / 衛星リモートセンシング / 作物モデル / 極端気象影響 / 機械学習 / 気候変動適応 / 全球データプロダクト
Outline of Research at the Start

気候変動下で深刻化する強雨や洪水といった局所的な災害による食料生産への影響を捉え、減災や適応を進めるためには時間・空間解像度が詳細な作物収量の全球グリッドデータが必要である。本研究ではこれまでに例がない月別・1kmでコメ収量の全球データプロダクトを近年11年間(2010-2020年)について作成し、開発途上国の小規模農家が気候変動に適応するための施策立案を支援する。本データプロダクトは、衛星リモートセンシングから得られる水田分布と植生指数、農業センサスの収量統計、作物モデルの数値シミュレーションにより出力される年間収穫回数と播種・収穫時期、収量といった複数の情報源を合成して作成する。

Outline of Final Research Achievements

Rice is a staple food and a source of calories for 4 billion people worldwide, primarily in Asia. The aim of this study is to develop a method for generating gridded yield data for rice at monthly and 1 km resolution. To achieve this, we enabled the eco-physiological process-based crop model to simulate rice’s daily growth and development at 1 km resolution in any rice-producing region of the world. Then we developed a method to integrate the process model estimates with satellite imagery and field observations using a machine learning technique. This method is applicable to any rice-producing region in the world, including multi-rice cropping regions. We applied this method to three countries, Madagascar, Sri Lanka and the Philippines, as the testbed to generate gridded yield data for the period 2012-2023, demonstrating that the characteristics of yield distribution and levels for both the rainy and dry seasons were accurately captured in the generated yield data.

Academic Significance and Societal Importance of the Research Achievements

グリッド収量データは世界の食料・農業システムに顕在化しつつある気候変動影響の検出に活用されてきた。しかし、開発途上国の小規模農家の気候変動適応に資するためには収量データの高解像度化が必要である。本研究で開発した1kmの収量データであれば、これまで困難だった、持続可能な開発目標(SDGs)の推進に向けた課題に取り組むことが可能になる。例えば、一つの州の中で生産規模が異なる生産者が混在している場合に適応技術の導入に規模間の差があるかどうかが検討可能になる。こうした解析から得られる知見は各国政府や国際機関が有限な資源をSDGsの達成に向けて効果的に割り当てることに役立つと期待される。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Comments on the Screening Results   Annual Research Report
  • Research Products

    (18 results)
  • Research Data

    (1 results)

All 2025 2024 2023 2022

All Journal Article (11 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 11 results,  Open Access: 11 results) Presentation (7 results)

  • [Journal Article] Crop phenology data extraction from research papers using a large language model2025

    • Author(s)
      Toshichika Iizumi, Yohei Ono, Takahiro Takimoto, Chaogejilatu
    • Journal Title

      Journal of Agricultural Meteorology

      Volume: 81 Issue: 2 Pages: 112-116

    • DOI

      10.2480/agrmet.D-24-00042

    • ISSN
      0021-8588, 1881-0136
    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Assessing the capacity of agricultural research and development to increase the stability of global crop yields under climate change2025

    • Author(s)
      Toshichika Iizumi, Toru Sakai, Yoshimitsu Masaki, Kei Oyoshi, Takahiro Takimoto, Hideo Shiogama, Yukiko Imada, David Makowski
    • Journal Title

      PNAS Nexus

      Volume: 4 Issue: 4

    • DOI

      10.1093/pnasnexus/pgaf099

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Toward improving global rice yield reference dataset compilation through machine learning: Insights from training data selection and random forest analysis2025

    • Author(s)
      Yoshimitsu Masaki, Toshichika Iizumi, Toru Sakai, Kei Oyoshi
    • Journal Title

      Journal of Agricultural Meteorology

      Volume: 81 Issue: 2 Pages: 90-105

    • DOI

      10.2480/agrmet.D-24-00033

    • ISSN
      0021-8588, 1881-0136
    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A climate impact attribution of historical rice yields in Sri Lanka using three crop models2025

    • Author(s)
      Asha S. Karunaratne, Chaogejilatu, Toshichika Iizumi
    • Journal Title

      Scientific Reports

      Volume: 15 Issue: 1 Pages: 15360-15360

    • DOI

      10.1038/s41598-025-00262-5

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Launch of the global preharvest crop forecast of climate-induced yield variations2025

    • Author(s)
      Toshichika Iizumi, Yonghee Shin
    • Journal Title

      Climate Research

      Volume: 94 Pages: 47-53

    • DOI

      10.3354/cr01751

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An improved crop calendar model for winter wheat incorporating vernalization and winter survival to project changes in phenology2024

    • Author(s)
      Keach Murakami, Toshichika Iizumi, Seiji Shimoda
    • Journal Title

      Environmental Research Food Systems

      Volume: - Issue: 1 Pages: 011002-011002

    • DOI

      10.1088/2976-601x/ad4609

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A hybrid reanalysis-forecast meteorological forcing data for advancing climate adaptation in agriculture2024

    • Author(s)
      Toshichika Iizumi, Takahiro Takimoto, Yoshimitsu Masaki, Atsushi Maruyama, Nobuyuki Kayaba, Yuhei Takaya, Yuji Masutomi
    • Journal Title

      Scientific Data

      Volume: 11 Issue: 1 Pages: 849-849

    • DOI

      10.1038/s41597-024-03702-5

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Increasing heavy rainfall events and associated excessive soil water threaten a protein-source legume in dry environments of West Africa2024

    • Author(s)
      Iizumi Toshichika、Iseki Kohtaro、Ikazaki Kenta、Sakai Toru、Shiogama Hideo、Imada Yukiko、Batieno Benoit Joseph
    • Journal Title

      Agricultural and Forest Meteorology

      Volume: 344 Pages: 109783-109783

    • DOI

      10.1016/j.agrformet.2023.109783

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Global modeling of SDG indicators related to small-scale farmers: testing in a changing climate2023

    • Author(s)
      Nozaki Noriko、Hosokawa Nanae、Doi Yasuhiro、Kim Wonsik、Iizumi Toshichika
    • Journal Title

      Environmental Research Communications

      Volume: 5 Issue: 3 Pages: 031006-031006

    • DOI

      10.1088/2515-7620/acc3e2

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] GCPE: The global dataset of crop phenological events for agricultural and earth system modeling2023

    • Author(s)
      MORI Akira、DOI Yasuhiro、IIZUMI Toshichika
    • Journal Title

      Journal of Agricultural Meteorology

      Volume: 79 Issue: 3 Pages: 120-129

    • DOI

      10.2480/agrmet.D-23-00004

    • ISSN
      0021-8588, 1881-0136
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High-temperature indicators for capturing the impacts of heat stress on yield: lessons learned from irrigated wheat in the hot and dry environment of Sudan2022

    • Author(s)
      Iizumi T、Tsubo M、Maruyama A、Tahir ISA、Kurosaki Y、Tsujimoto H
    • Journal Title

      Climate Research

      Volume: 89 Pages: 85-98

    • DOI

      10.3354/cr01709

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 機械学習(ランダムフォレスト)による収量推定と精度検証方法の議論2025

    • Author(s)
      眞﨑良光, 飯泉仁之直, 酒井徹, 大吉慶
    • Organizer
      日本農業気象学会2025年全国大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] ガーナにおける衛星土壌水分プロダクトの精度評価2024

    • Author(s)
      酒井徹, Prosper Kpoebaya・Alhassan Lansah Abdulai, 飯泉仁之直, 眞崎良光, 大吉慶
    • Organizer
      システム農学会2024年度大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 機械学習(ランダムフォレスト)による収量推定の学習データ依存性2024

    • Author(s)
      眞崎良光, 飯泉仁之直, 酒井徹, 大吉慶
    • Organizer
      日本農業気象学会2024年全国大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 衛星高度計を用いたカンボジアにおける洪水氾濫原の水位変化2023

    • Author(s)
      酒井徹, 張可, Thav Sopheak, 飯泉仁之直, 眞崎良光, 大吉慶
    • Organizer
      システム農学会2023年度大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 全球適用可能なイネの収量把握に向けた複数データソース結合の試み2023

    • Author(s)
      眞﨑良光,飯泉仁之直、酒井徹、大吉慶
    • Organizer
      日本農業気象学会2023年全国大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 主要作物のフェノロジーイベントを含む全球栽培暦データプロダクトの開発2023

    • Author(s)
      飯泉仁之直
    • Organizer
      日本農業気象学会2023年全国大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] エチオピア・フォガラ平原における水稲栽培適地の検出2022

    • Author(s)
      酒井徹,糟谷正広,新井圭介,白鳥清志,小川諭志
    • Organizer
      システム農学会
    • Related Report
      2022 Annual Research Report

All 2026

  • JRA55-JMACPS2-Delta-S14FD 再解析・予報接合気象外力データセット2026

    • Funder
      • Funder Name
        Japan Society For The Promotion Of Science
      • e-Rad_funder
        1025
      • Identifier of Crossref Funder Registry

        https://doi.org/10.13039/501100001691

      • Japan Grant Number
        JP22H00577
      • Project Name
        極端気象の影響が評価可能な月別・1km解像度の全球コメ収量データプロダクトの作成
    • Title
      JRA55-JMACPS2-Delta-S14FD 再解析・予報接合気象外力データセット
    • Issued Date
      2026-04-06
    • Abstract
      JRA-55再解析とJMA/MRI-CPS2予報をS14FD気象外力に対してそれぞれバイアス補正したうえで一つの日別時系列データとして接合した気象外力データ
    • Research Field
      環境
    • Data Type
      geospatial data
    • Data Utilization and Provision Policy
      CC-BY 4.0
    • Access Rights Type
      open access
    • Repository Information
      データ統合・解析システム
    • URI

      https://search.diasjp.net/en/dataset/JRA55_JMACPS2_Delta_S14FD

    • DOI

      10.20783/DIAS.649

    • Contributor
      • Contributor Type
        Data Manager
      • Contributor Name
        DIAS事務局
      • Contributor Type
        Hosting Institution
      • Contributor Name
        国立研究開発法人海洋研究開発機構
      • Contributor Type
        Contact Of Data Manager
      • Contributor Name
        dias-office*diasjp.net (メールアドレスは「@」を「*」に置換しています。)
    • Data No.

      JP22H00577-2024-0001

    • Related Report
      2024 Annual Research Report

URL: 

Published: 2022-04-19   Modified: 2026-04-14  

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