*Corresponding author

  1. Haruna Fujioka*,  Yasukazu Okada,
    “Liquid exchange via stomodeal trophallaxis in the ponerine ant Diacamma sp. from Japan” Journal of Ethology 37(3) (2019): 371-375.
  2. Haruna Fujioka*, Masato S. Abe, Yasukazu Okada,
    “Observation of plugging behaviour reveals entrance-guarding schedule of morphologically specialised caste in Colobopsis nipponicus Ethology 125(8) (2019): 526-534.
  3. Haruna Fujioka, Masato S. Abe,  Yasukazu Okada*,
    “Ant activity-rest rhythms vary with age and interaction frequencies of workers”
    Behavioral Ecology and Sociobiology 73.3 (2019): 30.
  4. Haruna Fujioka, Masato S. Abe, Taro Fuchikawa, Kazuki Tsuji, Masakazu Shimada, Yasukazu Okada*,
    Ant circadian activity rhythms associated brood care type,
    Biology Letters, 13.2 (2017): 20160743.
    プレスリリース 東大HP

Conference Proceedings (refereed)

  1. Haruna Fujioka, Masato S. Abe and Yasukazu Okada,
     Effect of age differences and group size on circadian activity rhythms  in queen-less ant Diacamma sp. from Japan.
    SWARM 2017, Kyoto University, October 29 – November 1, 2017
  2. Masato S. Abe, Haruna Fujioka, Yasukazu Okada.
    Characterizing spontaneous active and inactive patterns in ant individuals.
    SWARM 2017, Kyoto University, October 29 – November 1, 2017 


  1. 阿部真人, 藤岡春菜,
    日本ロボット学会誌  35.6 (2017): 455-458.