Time Trend Analysis of "#Rescue" Tweets During and After The 2017 Northern Kyushu Heavy Rain Disaster. - Shuji Nishikawa; Nozomi Tanaka; Keisuke Utsu; Osamu Uchida (ICT-DM, 2018)

Text Analysis of Tweets with Rescue Request Hashtags Posted during 2018 Japan Floods. - Megumi Kondo; Shuji Nishikawa; Osamu Uchida; Keisuke Utsu (ICT-DM, 2019)

Twitter-Based Safety Confirmation System for Disaster Situations. - Keisuke Utsu; Mariko Abe; Shuji Nishikawa; Osamu Uchida (Future Internet, 2020)