PeerJ Author 270 Points Contributions by role Author 270 Contributions by subject area Agricultural Science Animal Behavior Evolutionary Studies Veterinary Medicine Zoology Biodiversity Paleontology Yoshitsugu Kobayashi PeerJ Author Summary Agricultural Science Animal Behavior Evolutionary Studies Zoology Past or current institution affiliations Hokkaido University PeerJ Contributions Articles 2 April 5, 2022 A new juvenile Yamaceratops (Dinosauria, Ceratopsia) from the Javkhlant Formation (Upper Cretaceous) of Mongolia Minyoung Son, Yuong-Nam Lee, Badamkhatan Zorigt, Yoshitsugu Kobayashi, Jin-Young Park, Sungjin Lee, Su-Hwan Kim, Kang Young Lee https://doi.org/10.7717/peerj.13176 PubMed 35402094 November 12, 2020 Effects of diet and gizzard muscularity on grit use in domestic chickens Ryuji Takasaki, Yoshitsugu Kobayashi https://doi.org/10.7717/peerj.10277 PubMed 33240626