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Keita Fukasawa

National Institute for Environmental Studies

Tsukuba, 305-0053

Japan

  • National Institute for Environmental Studies

SCHOLARLY PAPERS

5

DOWNLOADS

146

TOTAL CITATIONS

0

Scholarly Papers (5)

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1.

Spatiotemporal Modelling of Water Quality in a Complex Riverine System with Physical Barriers

Number of pages: 28 Posted: 13 Jan 2024
Makoto Nishimoto, Tadashi Miyashita and Keita Fukasawa
affiliation not provided to SSRN, affiliation not provided to SSRN and National Institute for Environmental Studies
Downloads 50 (1,074,648)

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freshwater, Water quality, smoothing method, Spatial autocorrelation, Gaussian Markov random field, barrier model

2.

Increased culling reshapes the age structure of female Asian black bears through the loss of older age classes

Number of pages: 59 Posted: 02 Feb 2026
Kahoko Tochigi, Keita Fukasawa, Maximilian L. Allen, Tomoko Anezaki, Misako Kuroe, Tetsuya Maruyama, Koji Yamazaki and Shinsuke Koike
National Institute for Environmental Studies, National Institute for Environmental Studies, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Tokyo University of Agriculture and Tokyo University of Agriculture and Technology
Downloads 37 (1,359,097)

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age-at-harvest model, age structure, culling pressure, human–wildlife conflict, long-lived species, population dynamics, Ursus thibetanus

3.

Vehicle-Mounted Cameras Reveal Negative Impact of the Fukushima Daiichi Nuclear Power Plant Accident on Large Bird Abundance Via Paddy Field Abandonment

Number of pages: 45 Posted: 01 Aug 2025
Nao Kumada, Keita Fukasawa, Akira Yoshioka, Naoe Tsuda and Hirofumi Ouchi
National Institute for Environmental Studies, National Institute for Environmental Studies, National Institute for Environmental Studies, National Institute for Environmental Studies and affiliation not provided to SSRN
Downloads 36 (1,249,711)

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Abandoned paddy fields, Vehicle-mounted video camera, Agricultural birds, Distance sampling

4.

Optimizing the Frequency of Question Items for Bird Species in Quiz-Style Online Training

Number of pages: 18 Posted: 13 Jun 2024
Yui Ogawa, Keita Fukasawa, Akira Yoshioka, Nao Kumada, Akio Takenaka and Takashi Kamijo
University of Tsukuba, National Institute for Environmental Studies, National Institute for Environmental Studies, National Institute for Environmental Studies, affiliation not provided to SSRN and University of Tsukuba
Downloads 20 (1,470,786)

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Citizen Science, Quiz-style online training, Birdsong identification, Serious game, Learning outcomes

5.

Scaling up dung-based wildlife abundance estimation nationwide by modeling spatiotemporal heterogeneity in dung decomposition

Number of pages: 31 Posted: 22 Jul 2026
Haruka Ohashi and Keita Fukasawa
Forestry and Forest Products Research Institute and National Institute for Environmental Studies
Downloads 3

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Sika deer, Pellet-group decomposition, Hazard model, meta-analysis, Spatiotemporal variation, Density estimation