Tatsuya ISHIGAKI (石垣達也)'s page

Hi! My name is Tatsuya Ishigaki (石垣達也).

I am a researcher at Okumura-Takamura group at Tokyo Institute of Technology, focusing on Natural Language Processing (NLP).

My recent interests are:

  • Summarization (that takes into account linguistic knowledge.)
  • Document-level generation (particularly data-to-text).
  • Technologies to smooth human communications in hyper aged societies.

These interests lie on technologies to convert hard-to-understand data into easy-to-understand ones to smooth human communications.

Contact: ishigaki@lr.pi.titech.ac.jp, Twitter, LinkedIn, Google Scholar, GitHub



  1. 複数文質問を対象とした抽出型および生成型要約, 石垣 達也,高村 大也,奥村 学, 自然言語処理 (2019年3月), 2019

International Conferences (Refereed)

  1. Neural Query-biased Abstractive Summarization Using Copying Mechanism, Tatsuya Ishigaki, Hen-Hsen Huang, Hiroya Takamura, Hsin-Hsi Chen, Manabu Okumura, ECIR2020 [to appear]
  2. Distant Supervision for Extractive Question Summarization, Tatsuya Ishigaki, Kazuya Machida, Hayato Kobayashi, Hiroya Takamura, Manabu Okumura, ECIR2020 [to appear]
  3. Semi-Supervised Extractive Question Summarization Using Question-Answer Pairs, *Kazuya Machida, *Tatsuya Ishigaki, Hayato Kobayashi, Hiroya Takamura, Manabu Okumura, ECIR2020 [to appear] *equally contributed.
  4. Controlling Contents in Data-to-Document Generation with Human-Designed Topic Labels, Kasumi Aoki, Akira Miyazawa, Tatsuya Ishigaki, Tatsuya Aoki, Hiroshi Noji, Keiichi Goshima, Ichiro Kobayashi, Hiroya Takamura and Yusuke Miyao, INLG2019 [paper]
  5. Discourse-Aware Hierarchical Attention Network for Extractive Single-Document Summarization, Tatsuya Ishigaki, Hidetaka Kamigaito, Hiroya Takamura and Manabu Okumura, RANLP2019 [paper]
  6. Learning to Select, Track, and Generate for Data-to-Text, Hayate Iso, Yui Uehara, Tatsuya Ishigaki, Hiroshi Noji, Eiji Aramaki, Ichiro Kobayashi, Yusuke Miyao, Naoaki Okazaki, Hiroya Takamura, ACL2019 [paper]
  7. Generating Market Comments Referring to External Resources, Tatsuya Aoki, Akira Miyazawa, Kasumi Aoki, Keiichi Goshima, Tatsuya Ishigaki, Ichiro Kobayashi, Hiroya Takamura and Yusuke Miyao, INLG2018 [paper]
  8. Summarizing Lengthy Questions, Tatsuya Ishigaki, Hiroya Takamura, and Manabu Okumura, IJCNLP2017 [paper]

Workshops / Domestic Conferences (mostly written in Japanese)

  1. Supporting Information Recall for Elderly People in Hyper Aged Societies, Tatsuya Ishigaki, Jingyi You, Hiroki Takimoto, Manabu Okumura, ITAP2020 (co-located HCI International2020), 2020 [to appear]
  2. 超高齢社会における高齢者のための情報想起支援システム, 石垣達也, You Jingyi, 瀧本 洋喜, 奥村 学, 言語処理学会第26回年次大会, 2020 [to appear]
  3. コピー機構を用いたクエリ指向ニューラル生成型要約, 石垣達也, Hen-Hsen Huang, Hsin-Hsi Chen, 高村 大也, 奥村 学, 第240回自然言語処理研究会(NL240)(優秀研究賞), 2019 [paper]
  4. 談話構造を考慮する階層的注意機構による抽出型ニューラル単一文書要約, 石垣 達也, 上垣外 英剛, 高村 大也, 奥村 学, 言語処理学会第25回年次大会(若手奨励賞), 2019 [paper][slide]
  5. Data-to-Textにおける主題遷移のモデル化, 磯 颯, 上原 由衣, 石垣 達也, 能地 宏, 荒牧 英治, 小林 一郎, 宮尾 祐介, 岡崎 直観, 高村 大也, 言語処理学会第25回年次大会 , 2019 [paper]
  6. Distant Supervisionによる質問要約, 石垣 達也, 町田 和哉, 小林 隼人, 高村 大也, 奥村 学, 第236回情報処理学会自然言語処理研究会(NL236), 2018
  7. 「長文質問」のための抽出型及び生成型要約, 石垣 達也, 高村 大也, 奥村 学, 第232回情報処理学会自然言語処理研究会(NL232), 2017


  • April, 2015 - September, 2019 Tokyo Institute of Technology Ph.D supervised by Prof. Hiroya Takamura.
  • September, 2018 - December, 2018: National Taiwan University (visiting research student) supervised by Prof. Hsin-Hsi Chen.
  • April, 2013 - March, 2015: Tokyo Institute of Technology M.S supervised by Prof. Hiroya Takamura.


  • Okumura laboratory (April, 2019 - present): as a researcher.
  • AIRC (April, 2018 - March, 2019) : as a technical staff.
  • Okumura laboratory (April, 2018 - March, 2019): as a research assistant.
  • Ibaraki National Institute of Technology (April, 2015 - March, 2016): as a part-time lecturer.



  • 優秀研究賞: 情報処理学会第240回自然言語処理研究会(NL240), 2019
  • 若手奨励賞: 言語処理学会第25回年次大会(NLP2019), 2019
  • MEXT Leading Program "Academy of Global Leadership" (full tuition waiver + 200,000JPY/month, October 2013 - March 2018)


  • watching baseball games (Dragons)
  • visiting wineries / breweries (sake and beer). / distilleries (whiskey, shochu and awamori).