Research

Journal Article

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2025). Measuring Political Leader’s Geopolitical Risk Perceptions. International Economics, Volume 183, October 2025, 100631 https://doi.org/10.1016/j.inteco.2025.100631

Lim, Jaehwan, Ito, Asei, and Zhang, Hongyong. (2025). Unpacking China’s Wolf Warrior Diplomacy: A text-as-data approach. Journal of Contemporary China. https://doi.org/10.1080/10670564.2025.2557845

Zhang, Chao, and Ito, Asei. (2025). North Korea’s Economic Gains from Arms Exports to Russia: Evidence from Nighttime Lights Data, Applied Economics Letters. https://doi.org/10.1080/13504851.2025.2541801

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2025). Remembering Li Keqiang: Policy Divergence in Zhongnanhai and Its Economic Consequences, The China Quarterly, 262, pp.352–370. https://doi.org/10.1017/S0305741025000165.

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2024). Xi Jinping’s Important Speeches as Data. Asia-Pacific Review, 31(2), 13-49. https://www.tandfonline.com/doi/full/10.1080/13439006.2024.2398371

Lim, Jaehwan, Ito, Asei, and Zhang, Hongyong. (2024). Uncovering Xi Jinping’s Policy Agenda: Text as Data Approach. The Developing Economies. https://onlinelibrary.wiley.com/doi/10.1111/deve.12418

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2023). Catching the Political Leader’s Signal: Economic policy uncertainty and firm investment in China. China Economic Review, 102035. https://www.sciencedirect.com/science/article/abs/pii/S1043951X23001207

Shoji, Masahiro, Cato, Susumu, Ito, Asei, Iida, Takashi, Ishida, Kenji, Katsumata, Hiroto, and McElwain, Kenneth Mori. (2023) Mobile health technology as a solution to self-control problems: The behavioral impact of COVID-19 contact tracing apps in Japan, Social Science and Medicine, 306 115142-115142, Aug, 2022. https://www.sciencedirect.com/science/article/pii/S0277953622004488

Cato, Susumu, Iida, Takashi, Ishida, Kenji, Ito, Asei, Katsumata, Hiroto., McElwain, Kenneth & Shoji, Masahiro (2021) “The bright and dark sides of social media usage during the COVID-19 pandemic: Survey evidence from Japan”, International Journal of Disaster Risk Reduction, 54, 102034. https://www.sciencedirect.com/science/article/pii/S2212420920315363

Ito, Asei. (2019). China’s belt and road initiative and Japan’s response: from non-participation to conditional engagement. East Asia: An International Quarterly, 36, 115-128. https://link.springer.com/article/10.1007/s12140-019-09311-z

Ito, Asei. (2019). Digital China: A fourth industrial revolution with Chinese characteristics?. Asia-Pacific Review, 26(2), 50-75. https://www.tandfonline.com/doi/abs/10.1080/13439006.2019.1691836

Ito, Asei, Li, Zhuoran, and Wang, Min. (2017). Multi-level and Multi-route Innovation Policies in China: A Programme Evaluation Based on Firm-level Data, Millennial Asia, 8(1) 78-107, Apr, 2017. https://journals.sagepub.com/doi/abs/10.1177/0976399616686866

伊藤亜聖・于海春・御器谷裕樹・林載桓(2025)「量的テキスト分析による現代中国研究―「古くて新しい方法」の展開と課題―」『アジア経済』accepted.

伊藤亜聖・高口康太(2025)「中国における大規模言語モデルの革新と検閲」『現代中国』accepted.

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Outreach and past working paper

Working paper

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2023). Political Visits and Firm Value Evidence from central leaders’ local tours in China. RIETI Discussion Paper Series, 23-E-050. Under review. https://www.rieti.go.jp/en/publications/summary/23070015.html

伊藤亜聖・林載桓・于海春・御器谷裕樹(2025)「日本版中国研究者調査2025―概要と速報―」東京大学社会科学研究所ディスカッションペーパーシリーズNo.255.

Ito, Asei, Lim, Jaehwan, Yu, Haichun, Mikiya Yuki. (2025) Researching China from Japan: Preliminary Findings from a 2025 Scholar Survey. Harvard-Yenching Institute Working Paper Series. June 2025. https://www.harvard-yenching.org/research/researching-china-from-japan/.

Ito, Ase, and Takaguchi, Kota. (2025) Exporting Ideologies via AI? Early Assessment of Open-Source Chinese Large Language Models in Japan. Harvard-Yenching Institute Working Paper Series. August 2025. https://www.harvard-yenching.org/research/exporting-ideologies-via-ai-early-assessment-of-open-source-chinese-large-language-models-in-japan/

Past working paper

伊藤亜聖(2023)「習近平政権の政策語彙～2012年11月15日-2022年10月23日～」日本国際問題研究所・中国研究会報告書, 27-56頁. https://www.jiia.or.jp/pdf/research/R04_China/01-03.pdf.

伊藤亜聖・于海春・御器谷裕樹・林載桓(2024)「量的テキスト分析による現代中国研究―「古くて新しい方法」の展開と課題―」, 東京大学社会科学研究所ディスカッションペーパーJ-253. https://jww.iss.u-tokyo.ac.jp/publishments/dp/dpj/pdf/j-253.pdf

伊藤亜聖・高口康太(2024)「中国における大規模言語モデルの革新と検閲」東京大学社会科学研究所ディスカッションペーパーシリーズ日本語シリーズJ-250, 2024年5月. https://jww.iss.u-tokyo.ac.jp/publishments/dp/dpj/pdf/j-250.pdf

伊藤亜聖・林載桓・張紅詠 (2024).「データとしての習近平重要講話」東京大学社会科学研究所ディスカッションペーパーシリーズ日本語シリーズJ-249, 2024年4月. https://jww.iss.u-tokyo.ac.jp/publishments/dp/dpj/pdf/j-249.pdf

Lim, Jaehwan, Ito, Asei, and Zhang, Hongyong. (2023). Policy Agenda and Trajectory of the Xi Jinping Administration: Textual evidence from 2012 to 2022. RIETI Policy Discussion Paper Series, 23-P-008. https://www.rieti.go.jp/en/publications/summary/23070005.html

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2023). Remembering Li Keqiang: From divergence to convergence in Zhongnanhai. Harvard-Yenching Institute Working Paper Series, December 20, 2023. https://www.harvard-yenching.org/research/remembering-li-keqiang-from-divergence-to-convergence-in-zhongnanhai/

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2023). Belt and Road Initiative in Xi Jinping's Policy Agendas, mimeo, October 2023.

Zhang, Chao, and Ito, Asei. (2025). Illuminating Dark Deals: The Economic Impact of North Korean Arms Export to Russia. Institute of Social Science, The University of Tokyo, Discussion Paper Series (F-200). May 2025. Accepted at Applied Economics Letters. https://jww.iss.u-tokyo.ac.jp/publishments/dp/dpf/pdf/f-200.pdf

Lim, Jaehwan, Ito, Asei, and Zhang, Hongyong. (2024). Unpacking China’s Wolf Warrior Diplomacy: Patterns, Drivers, and Implications,　RIETI Discussion Paper Series, No. 25-E-028. https://www.rieti.go.jp/jp/publications/summary/25030010.html

Ito, Asei, Lim, Jaehwan, and Zhang, Hongyong. (2025). Measuring Political Leader’s Geopolitical Risk Perceptions. RIETI Discussion Paper Series, 25-E-035. https://www.rieti.go.jp/jp/publications/act_dp_en.html

Conference paper

伊藤亜聖・高口康太「日本向けにファインチューニングされた中国系大規模言語モデルに北京の検閲は残るか？」言語処理学会第31回年次大会発表論文集, 3050-3055頁, 2025年3月.

伊藤亜聖・高口康太「中国系大規模言語モデルにおける検閲的ファインチューニング」人工知能学会全国大会(第39回)発表論文集, 2025年5月.

Outreach

伊藤亜聖・林載桓・張紅詠 (2022).「政治指導者のシグナルを捉える：中国における経済政策不確実性と企業投資」RIETIノンテクニカルサマリー、2022年8月. https://www.rieti.go.jp/jp/publications/nts/22e081.html.

伊藤亜聖・林載桓・張紅詠 (2023).「政治家による企業訪問と企業価値：中国における中央指導者の現地視察からのエビデンス」RIETIノンテクニカルサマリー、2023年7月. https://www.rieti.go.jp/jp/publications/nts/23e050.html.

伊藤亜聖・林載桓・張紅詠 (2024).「在りし日の李克強と彼亡き後の中南海」RIETIスペシャルレポート、2024年1月10日.

https://www.rieti.go.jp/jp/special/special_report/202.html.

林載桓・伊藤亜聖・張紅詠(2025)「中国の戦狼外交を解明する：パターン、要因、及びその含意」RIETIノンテクニカルサマリー、2025年3月. https://www.rieti.go.jp/jp/publications/nts/25e028.html

伊藤亜聖・林載桓・張紅詠(2025)「政治指導者の地政学リスク認識を計測する」RIETIノンテクニカルサマリー、2025年4月. https://www.rieti.go.jp/jp/publications/nts/25e035.html