Publications
Peer-reviewed papers
Nakajima, K., Y. Imada, R. Ito, K. Oka 2026: Future Thermal Environment in Japan Using Large Ensemble Climate Dataset d4PDF —Can We Hold Outdoor Activities at Global 4°C Warming? Environmental Research: Climate. (URL)
Okajima, S., Y. Kosaka, T. Miyasaka, R. Ito 2025: Unprecedented marine heatwave significantly exacerbated the record-breaking 2023 East Asian summer heatwave. AGU Advances, 6, e2025AV001673, doi:10.1029/2025AV001673. (URL)
Ito, R., H. Endo, T. Ose, T. Nakaegawa 2025: Future atmospheric surface circulations and their impact on the regional climate of Japan based on the CMIP6 projections and observed statistics. HRL, 19, 1-7, doi:10.3178/hrl.24-00011. (URL)
Langendijk, Gaby S, and Coauthors 2024: Towards better understanding the urban environment and its interactions with regional climate change - The WCRP CORDEX Flagship Pilot Study URB-RCC. Urban Climate, 58, 102165-102165, doi:10.1016/j.uclim.2024.102165. (URL)
Sugimoto, S., S. A. Adachi, R. Ito, C. Suzuki 2024: Future Changes in Synoptic-Scale Conditions Causing Widespread Heavy Precipitation Events over Japan. SOLA, 20, 198-206, doi:10.2151/sola.2024-027. (URL)
Ito, R., Y. Imada, H. Kawase 2023: Characteristics of Attribution Risk on the Record-High-Temperature Event of 2022 Rainy Season in Japan. Bull. Amer. Meteor. Soc., 104, E2121–E2126, doi:10.1175/BAMS-D-23-0172.1. (URL)
Kawase, H., and Coauthors 2023: Identifying robust changes of extreme precipitation in Japan from large ensemble 5-km-grid regional experiments for 4K warming scenario. JGR: Atmospheres, 128, e2023JD038513, doi:10.1029/2023JD038513. (URL)
Ito, R., C. Suzuki, S. Sugimoto 2023: Variability of future increases in summertime extreme high temperatures on the Kanto Plain, Japan. SOLA, 19, 194–201, doi:10.2151/sola.2023-025. (URL)
Ito, R., H. Kawase, Y. Imada 2022: Regional differences in summertime extremely high temperature in Japan due to global warming. J. Appl. Meteor. Climatol., 61, 1573–1587, doi:10.1175/JAMC-D-22-0062.1. (URL)
Shiogama, H., N.N. Ishizaki, N. Hanasaki, K. Takahashi, S. Emori, R. Ito, T. Nakaegawa, I. Takayabu, Y. Hijioka, Y.N. Takayabu, R. Shibuya 2021: Selecting CMIP6-based future climate scenarios for impact and adaptation studies. SOLA, 17, 57–62, doi:10.2151/sola.2021-009. (URL)
Kawase, H., A. Murata, K. Yamada, T. Nakaegawa, R. Ito, R. Mizuta, M. Nosaka, S. Watanabe, H. Sasaki 2021: Regional characteristics of future changes in snowfall in Japan under RCP2.6 and RCP8.5 scenarios. SOLA, 17, 1–7, doi:10.2151/sola.2021-001. (URL)
Ito, R., T. Nakaegawa, I. Takayabu 2020: Comparison of regional characteristics of land precipitation climatology projected by an MRI-AGCM multi-cumulus scheme and multi-SST ensemble with CMIP5 multi-model ensemble projections. Prog. Earth Planet Sci., 7, 77, doi:10.1186/s40645-020-00394-4. (URL)
Ito, R., T. Ose, H. Endo, R. Mizuta, K. Yoshida, A. Kitoh, T. Nakaegawa 2020: Seasonal characteristics of future climate change over Japan and the associated atmospheric circulation anomalies in global model experiments. HRL, 14, 130–135, doi:10.3178/hrl.14.130. (URL) Award
Shiogama, H., R. Ito, Y. Imada, T. Nakaegawa, N. Hirota, N. Ishizaki, K. Takahashi, I. Takayabu, S. Emori 2020: Selecting future climate projections of surface solar radiation in Japan. SOLA, 16, 75–79, doi:10.2151/sola.2020-013. (URL)
Ito, R., H. Shiogama, T. Nakaegawa, and I. Takayabu 2020: Uncertainties in climate change projections covered by the ISIMIP and CORDEX model subsets from CMIP5. Geosci. Model Dev., 13, 859–872, doi:10.5194/gmd-13-859-2020. (URL)
Kawase H., T. Yamazaki, S. Sugimoto, T. Sasai, R. Ito, T. Hamada, M. Kuribayashi, M. Fujita, A. Murata, M. Nosaka, H. Sasaki 2020: Changes in extremely heavy and light snow-cover winters due to global warming over high mountainous areas in central Japan. Prog. Earth Planet Sci., 7, doi:10.1186/s40645-020-0322-x. (URL)
Takemi, T., R. Ito, 2020: Benefits of High-Resolution Downscaling Experiments for Assessing Strong Wind Hazard at Local Scales in Complex Terrain: A Case Study of Typhoon Songda (2004). Prog. Earth Planet Sci., 7, 4, doi:10.1186/s40645-019-0317-7. (URL)
山崎剛, 佐々井崇博, 川瀬宏明, 杉本志織, 大楽浩司, 伊東瑠衣, 佐々木秀孝, 藤田実季子 2019: 5km力学的ダウンスケーリングデータセット（SI-CAT DDS5TK）の概要. シミュレーション学会誌, 38, 145–149.
Morimoto, J., K. Nakagawa, K. T. Takano, M. Aiba, M. Oguro, Y. Furukawa, Y. Mishima, K. Ogawa, R. Ito, T. Takemi, F. Nakamura, C. J. Peterson, 2019: Comparison of vulnerability to catastrophic wind between Abies plantation forests and natural mixed forests in northern Japan, Forestry: An International Journal of Forest Research, cpy045, doi:10.1093/forestry/cpy045. (URL)
原田守啓, 丸谷靖幸, 伊東瑠衣, 石崎紀子, 川瀬宏明, 大楽浩司, 佐々木秀孝 2018: JRA-55再解析データのダウンスケーリング実験における地形モデル選択が洪水流出解析に及ぼす影響. 土木学会論文集B1(水工学), 74(5), 103–108.
丸谷靖幸, 原田守啓, 伊東瑠衣, 川瀬宏明, 大楽浩司, 佐々木秀孝 2018: 気候変動影響評価に向けた気候モデルおよび影響評価モデルの不確実性の評価. 土木学会論文集B1(水工学), 74(5), 109–114.
丸谷靖幸, 原田守啓, 伊東瑠衣, 川瀬宏明, 大楽浩司, 佐々木秀孝 2018: 気候変動影響評価に向けた降雨分布の空間解像度が流出解析に与える影響に関する検討. 土木学会論文集G(環境), 74(5), 147–156.
Ito, R., T. Aoyagi, N. Hori, M. Oh'izumi, H. Kawase, K. Dairaku, N. Seino, and H. Sasaki, 2018: Improvement of snow depth reproduction in Japanese urban areas by the inclusion of a snowpack scheme in the SPUC model. J. Meteor. Soc. Japan, 96, 511–534. doi:10.2151/jmsj.2018-053. (URL)
Sugimoto, S., R. Ito, K. Dairaku, H. Kawase, H. Sasaki, S. Watanabe, Y. Okada, S. Kawazoe, T. Yamazaki, T. Sasai, 2018: Impact of spatial resolution on simulated consecutive dry days and near-surface temperature over the central mountains in Japan. SOLA, 14, 46–51. doi:10.2151/sola.2018-008. (URL)
Kawase, H., T. Sasai, T. Yamazaki, R. Ito, K. Dairaku, S. Sugimoto, H. Sasaki, A. Murata, and M. Nosaka, 2018: Characteristics of synoptic conditions for heavy snowfall in western to northeastern Japan analyzed by the 5-km regional climate ensemble experiments. J. Meteor. Soc. Japan, 96, 161–178. doi:10.2151/jmsj.2018-022. (URL)
Takano, T. K., K. Nakagawa, M. Aiba, M. Oguro, J. Morimoto, Y. Furukawa, Y. Mishima, K. Ogawa, R. Ito, and T. Takemi 2016: Projection of impacts of climate change on windthrows and evaluation of potential adaptation measures in forest management: A case study from empirical modelling of windthrows in Hokkaido, Japan, by Typhoon Songda (2004). HRL, 10, 132–138, doi:10.3178/hrl.10.132. (URL)
Takemi, T., Y. Okada, R. Ito, H. Ishikawa, E. Nakakita 2016: Assessing the impacts of global warming on meteorological hazards and risks in Japan: Philosophy and achievements of the SOUSEI program. HRL, 10, 119–125, doi:10.3178/hrl.10.119. (URL)
Takemi, T., R. Ito and O. Arakawa 2016: Robustness and uncertainty of projected changes in the impacts of Typhoon Vera (1959) under global warming. HRL, 10, 88–94, doi:10.3178/hrl.10.88. (URL)
Takemi, T., R. Ito and O. Arakawa 2016: Effects of global warming on the impacts of Typhoon Mireille (1991) in the Kyushu and Tohoku regions. HRL, 10, 81–87, doi:10.3178/hrl.10.81. (URL)
Ito, R., T. Takemi, and O. Arakawa 2016: A possible reduction in the severity of typhoon wind in the northern part of Japan under global warming: A case study. SOLA, 12, 100–105, doi:10.2151/sola.2016-023. (URL)
Ito, R., T. Satomura and T. Takemi 2014: Comparison of temperature increases with urban surface cover for different geographical conditions in Japan. Geographical Review of Japan Series B, 87, 65–73, doi:10.4157/geogrevjapanb.87.65. (URL)
Ito, R., S. Yamane, and T. Satomura 2012: Effects of Land Reclamations in Osaka Bay on the Regional Climate. SOLA, 8, 29–32, doi:10.2151/sola.2012-008. (URL)
伊東瑠衣, 増田啓子, 増田富士雄 2008: 近畿地方の都市化による温暖化. 環境技術, 37, 428-433.
Conference proceedings
Ito, R., T. Satomura and T. Takemi 2015: Idealized experiments on the development of urban warming under various geographical conditions using a meso-scale meteorological model. 9th international conference on urban climate, 475, 6p.
Ito, R., and T. Satomura 2012: Relationship between geographical conditions and the temperature rise in Japanese cities. 8th international conference on urban climate, 266, 4p.
Reports
足立幸穂, 菅原広史, 竹林英樹, 大橋唯太, 伊東瑠衣, 志藤文武, 山本哲, 足永靖信 2016: 第9回国際都市気候会議(ICUC9)の報告. 天気, 63(3).
青柳暁典, 足立幸穂, 伊東瑠衣, 近藤裕昭, 日下博幸, 小田僚子, 大橋唯太, 清野直子 2013: 第8回国際都市気候会議(ICUC8)の報告. 天気, 60(2), 97-104, doi:10.5956/jriet.37.428. (URL)
Others
プレスリリース
"猛暑発生時の地上高温に対する地球温暖化の寄与を初めて評価 ―2022年初夏の猛暑に対する温暖化影響には地域差があった―", JAMSTECほか共同リリース、1 Dec 2023.(URL)
プレスリリース
"地球温暖化がさらに進行した場合、線状降水帯を含む極端降水は増加することが想定されます", 気象研ほか共同リリース、19 Sep 2023.(URL)
講師派遣 JICAプログラム「アフリカの若者のための産業人材育成イニシアティブ（ABEイニシアティブ）「修士課程およびインターンシッププログラム」」2/22-2/24, 同志社大学.
Giving a talk as an academic visitor
Comparison of urban climate between inland city and basin city using ideal experiments, UrbanMet meeting, Reading, United Kingdom, 4 Nov 2013.
Giving a talk as an academic visitor
Comparison of temperature change in urban areas between different geographical conditions, Met-micro meeting, London, United Kingdom, 12 Jun 2013.
読売新聞 研究紹介「大阪湾埋め立て 暑い夏」 読売新聞2011年8月8日掲載
Our study was introduced in the August 8 issue of Yomiuri newspaper.