About Our Research Group, Nasahara Laboratory
We are the Satellite Remote Sensing Group (Nasahara Lab.), a research unit within the Watershed Management Laboratory (流域管理研究室) at the University of Tsukuba (筑波大学).
Our laboratory conducts joint research and development in partnership with Japan Aerospace Exploration Agency (JAXA), Earth Observation Research Center (EORC) and Remote Sensing Technology Center of Japan (RESTEC).
This platform is dedicated to publishing and distributing High-Resolution Land Use and Land Cover (HRLULC) maps. This collection includes jointly developed products resulting from these institutional collaborations, as well as original maps developed independently by our laboratory members for various environmental and geospatial research projects.
Interactive Map Preview: HRLULC-Japan
You can switch background maps and toggle LULC visibility using the layer panel in the top-right corner.
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Interactive Map Preview: HRLULC-Bangladesh
High-resolution land cover map around Bangladesh. Swtch layers between 2020 and 2023 using the layer panel in the top-right corner.
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Interactive Map Preview: HRLULC-Indonesia
High-resolution land cover map around Western Indonesia. You can switch background maps and toggle LULC visibility using the layer panel in the top-right corner.
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Download HRLULC Map Products
Japan (日本) 🇯🇵
HRLULC 10 m resolution map of Japan coming soon
2024JPN_v26.xx_cropland: ?? categories
Download (.zip)HRLULC 10 m resolution map of Japan ~Detailing vegetation~
2024JPN_v26.03_vegetation: 30 categories
Download (.zip)HRLULC 10 m resolution map of Japan ~Detailing orchard categories~
2024JPN_v26.02_orchard: 27 categories
Download (.zip)Bangladesh (বাংলাদেশ) 🇧🇩
Vietnam (Việt Nam) 🇻🇳
Indonesia 🇮🇩
HRLULC 10 m resolution map around Western Indonesia (Java, Sumatra, Kalimantan)
2023_IDN_v26.03: 17 categories
Download (.zip)Published Papers
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🇻🇳Ta Hoang Trung, Nguyen Vu Ky, Duong Cao Phan, Duong Binh Minh, Ho Nguyen, Kenlo Nishida Nasahara. First Agriculture Land Use Map in Vietnam Using an Adaptive Weighted Combined Loss Function for UNET++. Remote Sens. 2026.
https://doi.org/10.3390/rs18030430 -
🇧🇩Sarker, M.M.; Chakraborty, D.; Truong, V.T.; Mizuno, Y.; Hirayama, S.; Tadono, T.; Parvin, M.I.; Ito, S.; Bhuiyan, M.A.A.; Hirade, N.; et al. The First National-Scale High-Resolution Land Use Land Cover Map of Bangladesh Using Multi-Temporal Optical and SAR Imagery. Earth 2025, 6, 143.
https://doi.org/10.3390/earth6040143 -
🇯🇵伊藤駿, 平山颯太, 田殿武雄, 今村一也, 平出尚義, 大串文美, 佐竹崚, 奈佐原顕郎. JAXA高解像度土地利用土地被覆図の改良に向けた関東域におけるカテゴリ追加および高精度化の試行 (Trial of New Categories and Accuracy Improvement for JAXA's High-Resolution Land Use and Land Cover Maps). 日本リモートセンシング学会誌 2025, 45(3), 169-180.
https://doi.org/10.11440/rssj.2025.003 -
🇻🇳Van Thinh Truong, Sota Hirayama, Duong Cao Phan, Thanh Tung Hoang, Takeo Tadono, Kenlo Nishida Nasahara. JAXA's new high-resolution land use land cover map for Vietnam using a time-feature convolutional neural network. Scientific Reports 2024, 14:3926.
https://doi.org/10.1038/s41598-024-54308-1 -
🇯🇵泉澤遥, 平山颯太, 水上陽誠, 奈佐原顕郎. 統合的ローカライゼーションによる沖縄島域高解像度土地利用土地被覆図の作成 (Creation of a High-Resolution Land Use and Land Cover Map for Okinawa Island by Integrated Localization). 日本リモートセンシング学会誌 2023, 43(2), 73-85.
https://doi.org/10.11440/rssj.2022.031 -
🇯🇵平山颯太, 田殿武雄, 大木真人, 水上陽誠, 奈佐原(西田)顕郎, 今村功一, 平出尚義, 大串文美, 道津正徳, 山之口勤. AXA 高解像度土地利用土地被覆図 日本域 21.11版(HRLULC-Japan v21.11)の作成 (Generation of High-Resolution Land Use and Land Cover Maps in JAPAN Version 21.11). 日本リモートセンシング学会誌 2022, 42(3), 199-216.
https://doi.org/10.11440/rssj.42.199 -
🇻🇳Duong Cao Phan, Ta Hoang Trung, Van Thinh Truong, Taiga Sasagawa, Thuy Phuong Thi Vu, Dieu Tien Bui, Masato Hayashi, Takeo Tadono, Kenlo Nishida Nasahara. First comprehensive quantification of annual land use/cover from 1990 to 2020 across mainland Vietnam. Scientific Reports 2021, 11:9979.
https://doi.org/10.1038/s41598-021-89034-5 -
🇯🇵片木仁, 奈佐原顕郎, 小林健一郎, 道津正徳, 田殿武雄. 多時期光学観測画像を用いた高解像度土地利用・土地被覆図における、山影処理による誤分類の低減 (Reduction of Misclassification Caused by Mountain Shadow in a High Resolution Land Use and Land Cover Map Using Multi-temporal Optical Images). 日本リモートセンシング学会誌 2018, 38(1), 30-34.
https://doi.org/10.11440/rssj.38.30 -
🛰Van Thinh Truong, Duong Cao Phan, Kenlo Nishida Nasahara, Takeo Tadono. How Does Land Use/Land Cover Map's Accuracy Depend on Number of Classification Classes? SOLA 2019, 15, 28-31.
https://doi.org/10.2151/sola.2019-006 -
🇻🇳Van Thinh Truong, Thanh Tung Hoang, Duong Cao Phan, Masato Hayashi, Takeo Tadono, Kenlo Nishida Nasahara. JAXA Annual Forest Cover Maps for Vietnam during 2015-2018 Using ALOS-2/PALSAR-2 and Auxiliary Data. Remote Sens. 2019, 11(20), 2412.
https://doi.org/10.3390/rs11202412