Research activity information

• Mar. 2026 関西農業食料工学会 03/03, Best Student Presentation Award, 果樹園モニタリングに向けた自律走行に関する基礎研究

  Yui Shimizu

  共同研究・競争的資金等の業績IDIRI


• Sep. 2025 関西農業食料工学会 09/28, Best Student Presentation Award, RGBカメラとLiDARのセンサフュージョンによる梨果実数カウントおよびマッピングシステムの開発

  Meguna OHATA

  共同研究・競争的資金等の業績IDIRI


• Sep. 2023 Kansai Society of Agricultural Machinery and Food Engineers, Young Scientist Award, Development of a pear cultivation support system utilizing ICT

  Jaehwan LEE


• Feb. 2022 鳥取大学, Tottori University College Fund

  Lee Jaehwan

• LiDAR–Camera Fusion for 3D Fruit Counting and Density Mapping in Horizontal Trellis Orchards

  Jaehwan Lee, Meguna Ohata, Hiromichi Itoh, Eiji Morimoto

  This study presents a real-time fruit monitoring system that integrates light detection and ranging (LiDAR) and RGB camera data for 3D fruit counting and spatial density mapping in horizontal trellis pear orchards. The system employs instance-level sensor fusion, combining YOLO-based 2D fruit detection with SLAM-generated 3D point clouds to localize and track individual fruits. A customized temporal tracking algorithm mitigates duplicate counts, while center-based spatial filtering improves detection accuracy. Among the four evaluated YOLO models, YOLOv11s was selected based on its F1-score, lowest false negatives (FN) count, and real-time performance. Field validation in a 6 m × 70 m orchard plot demonstrated high counting accuracy (96.2%) and reliable spatial density estimation, with a mean absolute error of 0.64 fruits/m ² . The system effectively identified yield variations across different orchard regions. These findings support the use of LiDAR–camera fusion for scalable, high-precision fruit monitoring in orchard environments, particularly in labor-intensive horizontal trellis systems.

  Lead, Fuji Technology Press Ltd., Apr. 2026, Journal of Robotics and Mechatronics, 38(2) (2), 449 - 459, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Grid-based Correlation Analysis of Surface Elevation and Topsoil Depth in a Rice Paddy Field Using a UAV and a Smart Rice Transplanter

  LEE Jaehwan, 吉田剛, 伊藤博通, 森本英嗣

  Lead, Dec. 2025, 農業食料工学会誌, 87(4) (4), 396 - 406

  [Refereed]


• Counting of Pear Flower Buds in Images by Judging Acquisition Conditions and Matching Keypoints.

  Takumi Hanakawa, Shintaro Nakatani, Jaehwan Lee, Eiji Morimoto, Masashi Nishiyama, Yoshio Iwai

  2025, ICCE, 1 - 6

  [Refereed]

  International conference proceedings


• Development of Flower Bud Detection System for Japanese Pear Based on YOLOv3

  LEE Jaehwan, 佐藤聡, 森本英嗣, 中谷真太朗, 西山正志, 山口武視, 野波和好

  Lead, Sep. 2023, 農業食料工学会誌, 85(5) (5), 301 - 307, Japanese

  [Refereed]

  Scientific journal


• Development of Tree Vigor Evaluation Method for Japanese pear by 3D Point Cloud Data

  Jaehwan LEE, Eiji Morimoto, Kazuyoshi Nonami, Akira Yano, Takeshi Yamaguchi

  Lead, 農業生産技術管理学会, Dec. 2022, Journal of Japanese Society of Agricultural Technology Management, 29(2) (2), 41 - 46, Japanese

  [Refereed]


• Development of pear cultivation management technology using information and communications technology for the next generation of farmers (Part2) ―Development of a water sprout estimation algorithm―

  Jaehwan LEE, Tsuyoshi YOSHIDA, Kazuyoshi NONAMI, Ichizen MATSUMURA, Akira YANO, So SATO, Keita OKAMURA, Eiji MORIMOTO

  Lead, 農業食料工学会事務局, Jul. 2022, Journal of the Japanese Society of Agricultural Machinery and Food Engineers, 84(4) (4), 238 - 244, Japanese

  [Refereed]


• Development of Pear Cultivation Management Technology Using Information and Communications Technology for the Next Generation of Farmers (Part 1)-Development of a Tree Extraction Method Applying 3D Laser Scanning-

  Jaehwan LEE, Tsuyoshi YOSHIDA, Kazuyoshi NONAMI, Ichizen MATSUMURA, Akira YANO, Eiji MORIMOTO

  Lead, 農業食料工学会事務局, Jul. 2021, Journal of the Japanese Society of Agricultural Machinery and Food Engineers, 83(4) (4), 274 - 281, Japanese

  [Refereed]

• Development of a measurement and analysis system for tillage operations in paddy fields (Report 1)

  Kazuto NISHIDA, Jaehwan LEE, Hiromichi ITOH, Eiji MORIMOTO

  Jun. 2025, Report of Kansai Society of Agricultural Machinery and Food Engineers, 138, 5 - 5


• 画像処理を用いた倒伏判定システムの開発(第3報)

  廣田颯矢, LEE Jaehwan, 森本英嗣

  2024, 農業食料工学会年次大会講演要旨(CD-ROM), 82nd


• ドローンを活用した日本ナシの樹勢診断手法の検討

  中嶋綾香, 川越義則, 梅田大樹, 甲斐貴光, 杉原敏昭, 森本英嗣, LEE Jaehwan

  2024, 農業食料工学会年次大会講演要旨(CD-ROM), 82nd


• LiDAR SLAMを用いた精密なブドウ樹勢評価システムの開発

  LEE Jaehwan, 森本英嗣

  2024, 農業食料工学会年次大会講演要旨(CD-ROM), 82nd


• RTK測位を用いた小型正条播種機の開発

  小嶺匠, LEE Jaehwan, 庄司浩一, 森本英嗣

  2024, 農業食料工学会年次大会講演要旨(CD-ROM), 82nd


• 水稲における耕起作業情報の計測および解析システムの開発

  西田一翔, LEE Jaehwan, 森本英嗣

  2024, 農業食料工学会年次大会講演要旨(CD-ROM), 82nd


• Development of depth-of-tillage control technology for plowing based on topsoil depth of paddy

  LEE Jaehwan, 森本英嗣, 吉田剛

  2023, 農業環境工学関連学会合同大会講演要旨集(CD-ROM), 2023


• Vineyardにおける剪定・芽かき支援システムの開発

  森本英嗣, 杉岡賢, イ ジェファン, 佐藤聡, 野波和好, 山口武視, 辻村克志, 千葉翔太, 佐々本博和

  2021, 農業食料工学会年次大会講演要旨, 79th (CD-ROM)


• MobileNetV2を用いたナシ選果システム

  佐藤聡, 森本英嗣, イ ジェファン, 野波和好, 山口武視

  2021, 農業食料工学会年次大会講演要旨, 79th (CD-ROM)


• 3次元レーザースキャナを適用した徒長枝抽出手法の開発

  LEE Jaehwan, 森本英嗣, 野波和好, 山口武視, 中谷真太朗

  Lead, 2021, 農業食料工学会年次大会講演要旨, 79th (CD-ROM)


• 果樹園における移動式生体観測ユニットの開発

  森本英嗣, LEE Jaehwan

  2019, 農業食料工学会年次大会講演要旨, 2019

• Development of a Measurement and Analysis System for Tillage Operations in Paddy Field (2rd Report)

  Risako YAMAUCHI, Jaehwan LEE, Hiromichi ITOH, Eiji MORIMOTO

  関西農業食料工学会、第155回例会、神戸大学, Mar. 2026, Japanese

  Oral presentation


• Fundamental Study on Autonomous Navigation for Orchard Monitoring

  Yui SHIMIZU, Jaehwan LEE, Hiromichi ITOH, Eiji MORIMOTO

  関西農業食料工学会、第155回例会、神戸大学, Mar. 2026, Japanese

  Oral presentation


• Fundamental Research on Techniques for Estimating Canopy Height via LiDAR

  Shutaro KATSUMATA, Jaehwan LEE, Hiromichi ITOH, Eiji MORIMOTO

  関西農業食料工学会、第155回例会、神戸大学, Mar. 2026, Japanese

  Oral presentation


• Development of a Real-Time Soil Sensor for Use during the Rice Growing Period (Report 1)

  Soya HIROTA, Jaehwan LEE, Hiromichi ITOH, Ryuji OCHI, Yo NAGAI, Eiji MORIMOTO

  関西農業食料工学会、第155回例会、神戸大学, Mar. 2026, Japanese

  Oral presentation


• Development of a Lodging Detection system by Image Processing (4)

  Ryo KASAGI, Jaehwan LEE, Hiromichi ITOH, Eiji MORIMOTO

  関西農業食料工学会、第155回例会、神戸大学, Mar. 2026, Japanese

  Oral presentation


• DEVELOPMENT OF RGB AND LIDAR FUSION BASED PEAR FRUIT QUANTIFICATION AND MAPPING SYSTEM

  Jaehwan LEE, Meguna OHATA, Eiji MORIMOTO

  The 11th Asian-Australasian Conference on Precision Agriculture ( ACPA11), Chiayi, Taiwan, Oct. 2025, English

  Oral presentation


• Portable Solid-state LiDAR for Early-stage Crop Canopy Height Estimation

  Eldon DE PADUA, Shutaro KATSUMATA, Yui SHIMIZU, Ryo KASAGI, Jaehwan LEE, Eiji MORIMOTO

  The 11th Asian-Australasian Conference on Precision Agriculture ( ACPA11), Chiayi, Taiwan, Oct. 2025, English

  Oral presentation


• DEVELOPMENT OF A MEASUREMENT AND ANALYSIS SYSTEM FOR TILLAGE OPERATIONS IN PADDY FIELDS

  Kazuto NISHIDA, Jaehwan LEE, Hiromichi ITOH, Eiji MORIMOTO

  The 11th Asian-Australasian Conference on Precision Agriculture ( ACPA11), Chiayi, Taiwan, Oct. 2025, English

  Oral presentation


• RGBカメラとLiDARを用いたナシのカウントおよびマッピングシステムの開発

  大畑愛奈, Lee Jaehwan, 伊藤博通, 森本英嗣

  関西農業食料工学会、第154回例会、愛媛大学, Sep. 2025, Japanese

  Oral presentation


• LiDAR センサを用いた水稲の草冠高計測における風の影響の検証

  勝亦柊太郎, De Padua Eldon, Lee Jaehwan, 森本英嗣

  関西農業食料工学会、第154回例会、愛媛大学, Sep. 2025, Japanese

  Oral presentation


• 水田における耕うん作業の計測および解析システムの開発(第1報)

  西田一翔, LEE Jaehwan, 森本英嗣

  関西農業食料工学会、第153回例会、京都大学大学院農学研究科, Mar. 2025, Japanese

  Oral presentation


• Counting of Pear Flower Buds in Images by Judging Acquisition Conditions and Matching Keypoints

  Takumi Hanakawa, Shintaro Nakatani, Jaehwan Lee, Eiji Morimoto, Masashi Nishiyama, Yoshio Iwai

  43rd IEEE International Conference on Consumer Electronics (ICCE), Las Vegas, NV, USA, Jan. 2025, English

  Oral presentation


• 水稲における耕起作業情報の計測および解析システムの開発

  西田一翔, LEE Jaehwan, 森本英嗣

  農業食料工学会、第82回年次大会、山形大学農学部, Sep. 2024, Japanese

  Oral presentation


• 画像処理を用いた倒伏判定システムの開発（第３報）

  廣田颯矢, LEE Jaehwan, 森本英嗣

  農業食料工学会、第82回年次大会、山形大学農学部, Sep. 2024, Japanese

  Oral presentation


• LiDAR SLAMを用いた精密なブドウ樹勢評価システムの開発

  LEE Jaehwan, 森本英嗣

  農業食料工学会、第82回年次大会、山形大学農学部, Sep. 2024, Japanese

  Oral presentation


• Evaluation of Weed Growth in Various Vegetation Types by 3-D Point Cloud

  Jaehwan Lee, Eiji Morimoto, Mayu Ota, Nguyen Van Dieu, Tadashi Chosa

  The 11th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB 2024), Bali, Indonesia, Sep. 2024, English

  Oral presentation


• Development Precise Vine Vigor Assessment Using LiDAR SLAM-Based System

  Jaehwan Lee, Eiji Morimoto

  CIGR International Commission of Agricultural and Biosystems Engineering (The 6th CIGR 2024), Jeju, Korea, May 2024, English

  Poster presentation


• Studies on the Non-contact Measurement Technology in Rice Seedling Nursery Period

  Meguna OHATA, Jaehwan LEE, Eiji MORIMOTO

  関西農業食料工学会、第151回例会、神戸大学大学院農学研究科, Mar. 2024, Japanese

  Oral presentation


• Development of Fruit Growth Detection System using Image Processing for Pears Production Marsupial Cultivation

  Rin NAKAYAMA, Jaehwan LEE, Eiji MORIMOTO

  関西農業食料工学会、第151回例会、神戸大学大学院農学研究科, Mar. 2024, Japanese

  Oral presentation


• 水田の作土深に基づく代かき深さ制御技術の開発

  LEE Jaehwan, 森本英嗣, 吉田 剛

  農業環境工学関連学会合同大会, 筑波大学春日キャンパス, つくば国際会議場, Sep. 2023, Japanese

  Oral presentation


• MobileNetV2を用いたナシ選果システム

  佐藤 聡, 森本英嗣, LEE Jaehwan, 野波和好, 山口武視

  農業食料工学会, 第79回年次大会, オンライン, Sep. 2021, Japanese

  Oral presentation


• Vineyardにおける剪定・芽かき支援システムの開発

  森本英嗣, 杉岡 賢, LEE Jaehwan, 佐藤 聡, 野波和好, 山口武視, 辻村克志, 千葉翔太, 佐々本博和

  農業食料工学会, 第79回年次大会，オンライン, Sep. 2021, Japanese

  Oral presentation


• 3次元レーザースキャナを適用した徒長枝抽出手法の開発

  LEE Jaehwan, 森本英嗣, 野波和好, 山口武視, 中谷真太朗

  農業食料工学会、第79回年次大会、オンライン, Sep. 2021, Japanese

  Oral presentation


• 画像処理を用いた簡易なナシ選果システムの開発

  佐藤 聡, 森本英嗣, LEE Jaehwan, 野波和好

  関西農業食料工学会、第153回例会、オンライン, Mar. 2021, Japanese

  Oral presentation


• Development of Canopy Mapping System of Asian pears (Pyrus pyrifolia Nakai) Using Terrestrial Laser Scanning

  LEE Jaehwan, MORIMOTO Eiji, NONAMI Kazuyoshi, MATSUMURA Ichizen, SATO So, IKEBE Mana

  AfCPA, Oct. 2020, English

  Oral presentation


• Development of 3D Data of Pear Orchard Processing Algorithm Using Python

  WATANABE Soichiro, LEE Jaehwan, MORIMOTO Eiji

  The 16th International Symposium on Agricultural, Food, Environmental and Life Sciences in Asia (AFELiSA), 米子市, Nov. 2019, English

  Oral presentation


• Development of Canopy Mapping System Using Terrestrial Laser Scanning:Yield prediction

  LEE Jaehwan, MORIMOTO Eiji

  The 16th International Symposium on Agricultural, Food, Environmental and Life Sciences in Asia (AFELiSA), 米子市, Nov. 2019, English

  Oral presentation


• 果樹園における移動式生体観測ユニットの開発

  森本英嗣, LEE Jaehwan

  2019年農業食料工学会・農業施設学会・国際農業工学会第6部会合同国際大会, 北海道大学農学部, Sep. 2019, Japanese

  Oral presentation


• Detection of Flower Bud in Japanese Pear Orchard by UAV: Prediction of Yield Through Number of Flower Buds

  LEE Jaehwan, WATANABE Soichiro, MORIMOTO Eiji

  The 15th International Symposium on Agricultural, Food, Environmental and Life Sciences in Asia (AFELiSA), 江原大学, 韓国, Nov. 2018, English

  Oral presentation

• International Society of Precision Agriculture (ISPA)

  Jan. 2026 - Present


• The Japanese Society of Agricultural Machinery and Food Engineers (JSAM)

  2017 - Present


• The Japanese Society of Agricultural Technology Management

  2022 - 2024

• Development of a variable tillage navigation system based on soil information

  森本 英嗣, 伊藤 博通, LEE JAEHWAN

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Kobe University, 01 Apr. 2024 - 31 Mar. 2029


• LiDARと近赤外線カメラによる果樹生育モニタリングの自動化システムの構築

  LEE JAEHWAN

  日本学術振興会, 科学研究費助成事業, 若手研究, 神戸大学, Apr. 2025 - Mar. 2028