Eiichi Umehara

According to our database, Eiichi Umehara authored at least 10 papers between 2009 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of five.

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

2021

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

Proceedings of the WI-IAT '21: IEEE/WIC/ACM International Conference on Web Intelligence, Hybrid Event / Melbourne, VIC, Australia, December 14 - 17, 2021, 2021

2020

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

Proceedings of the 53rd Hawaii International Conference on System Sciences, 2020

2018

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

Proceedings of the IEEE International Conference on Big Data (IEEE BigData 2018), 2018

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

Proceedings of the 2017 IEEE International Conference on Big Data (IEEE BigData 2017), 2017

Analysis of twitter messages about the osaka metropolis plan in Japan.

Kouki Hayashi, Eiichi Umehara, Yuuki Ogawa

Proceedings of the 2017 IEEE International Conference on Big Data (IEEE BigData 2017), 2017

2012

Stock BBS Factor Model Using Principal Component Score.

Hirohiko Suwa, Eiichi Umehara, Toshizumi Ohta

Proceedings of the Advances in Computational Social Science, 2012

2011

Game of Risk Communications - The Case of a Japanese Carmaker.

Eiichi Umehara, Toshizumi Ohta

IEEE Trans. Syst. Man Cybern. Part A, 2011

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

Is Stock BBS Content Correlated with the Stock Market? A Japanese Case.

Ken Maruyama, Eiichi Umehara, Hirohiko Suwa, Toshizumi Ohta

Proceedings of the IEEE International Conference on Systems, 2009