Is Stock BBS Content Correlated with the Stock Market? A Japanese Case. - Ken Maruyama; Eiichi Umehara; Hirohiko Suwa; Toshizumi Ohta (SMC, 2009)

Using Game Theory to Investigate Risk Information Disclosure by Government Agencies and Satisfying the Public - The Role of the Guardian Agent. - Eiichi Umehara; Toshizumi Ohta (IEEE Trans. Syst. Man Cybern. Part A, 2009)

Game of Risk Communications - The Case of a Japanese Carmaker. - Eiichi Umehara; Toshizumi Ohta (IEEE Trans. Syst. Man Cybern. Part A, 2011)

Stock BBS Factor Model Using Principal Component Score. - Hirohiko Suwa; Eiichi Umehara; Toshizumi Ohta (WCSS, 2012)

Analysis of twitter messages about the osaka metropolis plan in Japan. - Kouki Hayashi; Eiichi Umehara; Yuuki Ogawa (IEEE BigData, 2017)

Develop method to predict the increase in the Nikkei VI index. - Hirohiko Suwa; Yuki Ogawa; Eiichi Umehara; Kento Kakigi; Keiichi Yasumoto; Tatsuo Yamashita; Kota Tsubouchi (IEEE BigData, 2017)

Simulation of Volatility Trading using Nikkei Stock Index Option based on Stock Bulletin Board. - Kodai Sasaki; Yui Hirose; Eiichi Umehara; Hirohiko Suwa; Yuki Ogawa; Tatsuo Yamashita; Kota Tsubouchi (IEEE BigData, 2018)

Evaluation of VI Index Forecasting Model by Machine Learning for Yahoo! Stock BBS Using Volatility Trading Simulation. - Kodai Sasaki; Hirohiko Suwa; Yuki Ogawa; Eiichi Umehara; Tatsuo Yamashita; Kota Tsubouchi (HICSS, 2020)

Prediction of Nikkei VI increase for reducing investment risk using Yahoo! JAPAN stock BBS. - Kentaro Ueda; Kodai Sasaki; Hirohiko Suwa; Yuki Ogawa; Eiichi Umehara; Tatsuo Yamashita; Kota Tsubouchi; Keiichi Yasumoto (WI/IAT (Workshop/Special Session), 2021)

ForumPFN: Online Forum Post Fusion Network for Volatility Index Movement Prediction. - Kentaro Ueda; Hirohiko Suwa; Eiichi Umehara; Yuki Ogawa; Tatsuo Yamashita; Kota Tsubouchi; Keiichi Yasumoto (IEEE Big Data, 2024)

SSCDV: Social media document embedding with sentiment and topics for financial market forecasting. - Kentaro Ueda; Hirohiko Suwa; Masaki Yamada; Yuki Ogawa; Eiichi Umehara; Tatsuo Yamashita; Kota Tsubouchi; Keiichi Yasumoto (Expert Syst. Appl., 2024)