Research and studies

List of survey and research results

• 2025.11

  Cataract surgery training and post-operative care for South American fur seal

  Presentation format:

  Oral presentation

  Announcement:

  Japan Association of Zoos and Aquariums Marine Mammal Technician Research Group

  Sakiko Kojima, Hiroe Tsunezumi, Arina Nakajima, Yasuyuki Nomura (Sumida Aquarium)

• 2025.09

  Development of genetic markers for Magellanic penguins in captivity in aquariums

  Presentation format:

  Poster presentation

  Announcement:

  The 96th Annual Meeting of the Zoological Society of Japan in Nagoya

  Miki Kido, Tomoaki Morisaki (Tokyo University of Agriculture), Yuichi Koshiishi (Tokyo University of Agriculture and Hokkaido University), Takahiro Yonezawa, Jiaqi Wu (Hiroshima University), Yukari Takashima, Hiroe Tsunezumi (Sumida Aquarium), Chiho Kezuka (Suma Sea World), Takashi Kuramoto (Tokyo University of Agriculture)

• 2025.07

  Examination of methods for assessing fertility in South American fur seal

  Presentation format:

  Poster presentation

  Announcement:

  Wildlife Conservation and Breeding Study Group

  Hiroe Tsunezumi, Yasuyuki Nomura (Sumida Aquarium), Junpei Terakawa, Mirai Nanbu, Tomoka Iwa, Hana Kaneko, Rina Tanaka, Misaki Yamada, Kaho Ta, Nonoka Ishida, Takashi Yamamoto, Junya Ito (Azabu University)

• 2025.05

  Do pairs exhibit similar behaviours? Evaluating inter-individual synchrony in activities of Magellanic penguins

  Presentation format:

  Post

  Announcement:

  Applied Animal Behaviour Science

  Takashi Yamamoto (Azabu University), Tomohiro Kakizaki, Yukari Takashima, Hiroe Tsunesumi (Sumida Aquarium), Ken Yoda (Nagoya University)

• 2025.02

  Thinking about a future where we can live with Magellanic penguins- Through the lives of Magellanic penguins in Argentina

  Presentation format:

  Oral presentation

  Announcement:

  penguins Conference National Convention

  Yukari Takashima, Tomohiro Kakizaki (Sumida Aquarium)

• 2025

  Ogasawara black crab

  Presentation format:

  First breeding certification

  Announcement:

  Japan Association of Zoos and Aquariums

  Sumida Aquarium

• 2024.12

  Examination of tamoxifen citrate as a method for suppressing egg laying in Magellanic penguins

  Presentation format:

  Poster presentation

  Announcement:

  The 30th Annual Meeting of the Japanese Society of Wildlife Medicine

  Hiroe Tsunezumi, Tomohiro Kakizaki (Sumida Aquarium), Tomoko Noguchi (Azabu University)

• 2024.11

  Effects of lighting regimes on nutritional status and estrous cycle in indoor-reared South American fur seal

  Presentation format:

  Poster presentation

  Announcement:

  Society for the Study of Captive Wild Animal Nutrition

  Yumiko Nagaoka, Hiroe Tsunezumi (Sumida Aquarium), Junichi Shiraishi, Yoshiyuki Ota (Nippon Veterinary and Life Science University)

• 2024.09

  Are they all the same? Individual differences in behavior in captive penguins

  Presentation format:

  Oral presentation

  Announcement:

  Society for Animal Behavior and Management

  Takashi Yamamoto (Azabu University), Tomohiro Kakizaki, Yukari Takashima, Hiroe Tsunezumi (Sumida Aquarium)

• 2022.12

  Reproduction progress of South American fur seal on short-term breeding loans

  Presentation format:

  Oral presentation

  Announcement:

  Japan Association of Zoos and Aquariums Marine Mammal Technician Research Group

  Yumiko Nagaoka, Tomoaki Fujiwara, Hiroe Tsunezumi, Anri Nemoto, Arina Nakajima (Sumida Aquarium), Tadashi Kaminaga, Eri Miyamoto (Tobu Zoo)

• 2022.07

  An example of restraining a penguins during an examination at Sumida Aquarium

  Presentation format:

  Oral presentation

  Announcement:

  penguins Breeding Technician Research Group

  Natsuki Oshiro, Yukari Takashima, Hiroe Tsunezumi (Sumida Aquarium)

• 2021.12

  Attempt to monitor the behavior of captive animals using an acceleration data logger

  Presentation format:

  Post

  Announcement:

  Zoo and Aquarium Magazine

  Takashi Yamamoto (Meiji University), Takahiko Ide, Hiroyuki Nakayama, Koji Shimomura, Masashi Ueno, Harunobu Hisada, Asami Tanada (Tennoji Zoo), Tomohiro Kakizaki, Yukari Takashima (Sumida Aquarium), Ken Yoda (Nagoya University)

• 2021.12

  Sex steroid hormones in South American fur seal

  Presentation format:

  Oral presentation

  Announcement:

  Japan Association of Zoos and Aquariums Zoo Technician Research Group

  Arina Nakajima, Tomoaki Fujiwara, Yumiko Nagaoka, Hiroe Tsunezumi, Anri Nemoto, Yuka Tanaka (Sumida Aquarium)

• 2019.02

  An example of restraint in Magellanic penguins

  Presentation format:

  Post

  Announcement:

  THE PENGUIN

  Yukari Takashima, Hiroe Tsunezumi (Sumida Aquarium)

• 2019.02

  About the Adult Workshop penguins Watch

  Presentation format:

  Oral presentation

  Announcement:

  penguins Conference National Convention

  Yukari Takashima (Sumida Aquarium)

• 2018.12

  Relationship between body weight and blood triglycerides (TG) in female southern South American fur seal

  Presentation format:

  Oral presentation

  Announcement:

  Japan Association of Zoos and Aquariums Marine Mammal Technician Research Group

  Harumasa Ashikari, Yumiko Nagaoka, Hiroe Tsunezumi (Sumida Aquarium)

• 2018.01

  A report on a case of restraint in a Magellanic penguins

  Presentation format:

  Oral presentation

  Announcement:

  penguins Breeding Technician Research Group

  Yukari Takashima, Hiroe Tsunezumi (Sumida Aquarium)

• 2017.08

  Natural History of the Japanese Crayfish VIII - Japanese Crayfish Depicted in Ukiyo-e Prints from the Edo Period -

  Presentation format:

  Post

  Announcement:

  Journal of the Japanese Society of Crustaceans

  Harumasa Ashikari (Sumida Aquarium), Tadashi Kawai (Hokkaido Fisheries Department)

• 2016.03

  Educational Practice Report: Introducing Sumida Aquarium's Activities - Using jellyfish as an Example

  Presentation format:

  Poster presentation

  Announcement:

  Oceanographic Society Spring Conference

  Toshiyuki Nakatsubo, Ikuri Kato, Tomohiro Kakizaki (Sumida Aquarium)

• 2016.03

  Hokusai and Aquatic Creatures: Creatures Depicted in Hokusai Manga

  Presentation format:

  Post

  Announcement:

  Hokusai Research

  Toshiyuki Nakatsubo (Sumida Aquarium)

• 2016.01

  Changes in Magellanic penguins behavior due to projection mapping

  Presentation format:

  Oral presentation

  Announcement:

  penguins Conference National Convention

  Kazuki Hamada, Harumasa Ashikari, and Ikuri Kato (Sumida Aquarium)

• 2015.11

  Milking of South American fur seal and analysis of milk components

  Presentation format:

  Oral presentation

  Announcement:

  Yugyokai Symposium

  Yumiko Nagaoka, Harumasa Ashikari (Sumida Aquarium)

• 2015.08

  Spawning behaviour of garden eels,Gorgasia preclara and Heteroconger Hassi（Heterocongridae）,observed in captivity

  Presentation format:

  Post

  Announcement:

  Marine and Freshwater Behaviour and Physiology

  Tomohiro Kakizaki, Keisuke Kobayashi, Toshiyuki Nakatsubo (Sumida Aquarium), Ryoshiro Wakiya (Kyushu University), Shun Watanabe, Michael J. Miller, Katsumi Tsukamoto (Nihon University)

• 2014.12

  Assisting Magellanic penguins hatching

  Presentation format:

  Oral presentation

  Announcement:

  penguins Conference National Convention

  Harumasa Ashikari, Yukari Takashima, Hiroe Tsunezumi (Sumida Aquarium)

• 2014.11

  Examination behavior training for South American fur seal

  Presentation format:

  Oral presentation

  Announcement:

  Yugyokai "Fin and Leg Workshop"

  Harumasa Ashikari, Hiroe Tsunezumi (Sumida Aquarium)