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Affiliation |
Faculty of Agriculture Region of Animal and Plant Biosciences |
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Title |
Assistant Professor |
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Related SDGs |
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HEMMI Koichiro
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Papers 【 display / non-display 】
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Effect of dam and calf size on neutrophil population in the uterine lumen of Japanese black cattle Reviewed
HEMMI Koichiro, IWAMATSU Nozomi, UKYO Rina, KUROKI Tsubasa, TSUZUKI Yasuhiro, KOBAYASHI Ikuo
Nihon Danchi Chikusan Gakkaihou 69 ( 1 ) 31 - 40 2026
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Warm Regional Society of Animal Science, Japan
This study investigates the relationship between postpartum uterine inflammation and morphometric measurements of dams and calves in Japanese Black cattle. Twenty multiparous cows and their newborn calves were examined. Morphometric measurements were taken, including withers height, hook width, pelvic width, ischial width, and rump length in dams, as well as facial dimensions and limb traits in calves, were recorded. Uterine endometrial samples were collected using the cytobrush technique at 1, 3, 5, and 7 weeks postpartum (1 WP, 3 WP, 5 WP, and 7 WP), with polymorphonuclear neutrophil percentage (PMN%) determined as an inflammation indicator. Among dam traits, only rump length showed significant nonlinear associations with PMN% at 1 WP and 3 WP. Cows with very short or long rumps tended to show a decrease in PMN% from 1 WP to 3 WP, suggesting resolution of inflammation. Calf face width and limb length were also significantly correlated with PMN% levels and their changes between weeks. These findings indicate that simple, non-invasive morphometric traits may help predict postpartum uterine recovery. In particular, tracking PMN% changes over time (e.g., Δ1–3w, Δ3–5w) may provide a more accurate assessment than single-time measurements. This approach may aid in identifying cows at risk of delayed uterine recovery and support improved reproductive management in Japanese Black cattle.Journal of Warm Regional Society of Animal Science, Japan 69（1）：31-40，2026
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Daily body temperature fluctuations of Japanese Black female calves using a CIDR for sheep with data-logger Reviewed
K. Hemmi, K. Uenishi, Y. Tsuzuki, I. Kobayashi
日本暖地畜産学会報 67 29 - 33 2024
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Effects of pasture season on the body temperature, steps-taken, and body weight of Japanese black cows Reviewed
HEMMI Koichiro, TSUZUKI Yasuhiro, TOKUMARU Miyu, KOBAYASHI Ikuo
Nihon Danchi Chikusan Gakkaihou 65 ( 2 ) 77 - 84 2022
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Warm Regional Society of Animal Science, Japan
Understanding the physiological condition of grazing cows according to the season is effective for proper feeding management. To clarify the effects of season, this study investigated differences between spring and summer on the body temperature, steps-taken, and body weight of Japanese black cows. The pasture periods were 7 days in both seasons. The amount of grass was measured before and after pasture. The same 5 non-pregnant, non-nursing cows were used in both seasons. The body (vaginal) temperature was recorded using a data-logger attached to a CIDR. A pedometer was attached to the foreleg to measure the number of steps taken. To calculate the body weight gain, each cow’s body weight was measured before and after pasture. The body temperature fluctuations were different between seasons. The body temperature and steps-taken during pasture were significantly higher in spring than summer (P<0.01). There was a significant negative relation between the number of steps taken and the body weight gain (P<0.05). In conclusion, the amount and quality of grass in the pasture differed due to the pasture season, and it is possible that the increase in steps-taken was due to walking around the pasture looking for grass. Moreover, it was suggested that the increased number of steps-taken caused the seasonal difference in body temperature fluctuations.
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Seasonal variation in daily body temperature fluctuations in grazing sheep in the Aso region, Japan Reviewed
K. Hemmi, Y. Tsuzuki, I. Kobayashi, C. Tani, M. Tani
日本暖地畜産学会報 62 119 - 123 2019
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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阿蘇地域の夏季・冬季における放牧褐毛和種の体温日内変動 Reviewed
邉見広一郎, 谷千賀子, 服部法文, 實田正博, 山中猛, 佐々木洋介, 片本宏, 森友靖生, 谷峰人
肉用牛研究会報 103 14 - 19 2017
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
Presentations 【 display / non-display 】
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ブタ卵母細胞の体外受精に及ぼすフルオキセチンの影響
渡邉媛圭，右京里那，邉見広一郎，續木靖浩
日本暖地畜産学会（第18回大会，佐賀） 2025.10
Event date： 2025.10
Language：Japanese Presentation type：Oral presentation (general)
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黒毛和種経産牛の正常分娩に伴う子宮頸管熟化における炎症性サイトカインmRNAの動態
金丸和之，北原豪，上松瑞穂，邉見広一郎，小林郁雄，大澤健司
日本繁殖生物学会（第116回大会，神戸） 2023.9
Event date： 2023.9.24 - 2023.9.27
Language：Japanese Presentation type：Oral presentation (general)
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季節と飼養管理方法が黒毛和種繁殖雌牛の行動と体温に及ぼす影響
邉見広一郎, 徳丸実夢, 小林郁雄, 續木靖浩
日本畜産学会 (第131回大会，帯広) 2023.9.20
Event date： 2023.9.18 - 2023.9.23
Language：Japanese Presentation type：Oral presentation (general)
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寒冷環境が肉用牛の卵子および卵胞液における酸化ストレスに及ぼす影響
金田昂大，E. Omnia, 邉見広一郎，小林郁雄，佐藤礼一郎，大澤健司
日本獣医学会学術集会（第166回大会，東京農工大学Web開催） 2023.9
Event date： 2023.9.5 - 2023.9.8
Language：Japanese Presentation type：Oral presentation (general)
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Macrophage and cytokine dynamics in cervical ripening in cows International conference
T. Osawa, K. Kanemaru, K. Hemmi, I. Kobayashi, G. Kitahara
11th International Ruminant Reproduction Conference (Ireland: Galway) 2023
Event date： 2023.5.28 - 2023.6.1
Language：English Presentation type：Oral presentation (general)
Grant-in-Aid for Scientific Research 【 display / non-display 】
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分娩前の青草の給与が母乳成分と子牛の成長に及ぼす影響
Grant number：25H00219 2025.04 - 2026.03
奨励研究
Authorship：Principal investigator
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放牧時期の違いが黒毛和種繁殖牛の運動量、体温、摂食量に及ぼす影響
Grant number：20H00980 2020.04 - 2021.03
奨励研究
Authorship：Principal investigator
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母牛体重に対する子牛体重の大きさが分娩直後母牛の生殖器官回復に及ぼす影響
Grant number：17H00466 2017.04 - 2018.03
奨励研究
Authorship：Principal investigator
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仔牛の成長率と母牛の繁殖性との関係に関する研究
Grant number：16H00478 2016.04 - 2017.03
奨励研究
Authorship：Principal investigator
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黒毛和種における体温変化から予測する分娩時刻
Grant number：21925022 2009.04 - 2010.03
奨励研究
Authorship：Principal investigator
Available Technology 【 display / non-display 】
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黒毛和種繁殖雌牛の栄養管理と母子の生理応答
黒毛和種繁殖雌牛の分娩後の繁殖機能回復
黒毛和種母子の生理・行動応答に基づく放牧管理Message：母牛の繁殖性向上、子牛の健全育成、放牧の有効活用など、生産現場の課題に関する技術相談や共同研究について、お気軽にご相談ください。