A lighting model aiming at drive simulators. - Eihachiro Nakamae; Kazufumi Kaneda; Takashi Okamoto; Tomoyuki Nishita (SIGGRAPH, 1990)

Photorealistic image synthesis for outdoor scenery under various atmospheric conditions. - Kazufumi Kaneda; Takashi Okamoto; Eihachiro Nakamae; Tomoyuki Nishita (Vis. Comput., 1991)

A Differential-analysis Approach for Improving SOAP Processing Performance. - Yoichi Takeuchi; Takashi Okamoto; Kazutoshi Yokoyama; Shigeyuki Matsuda (EEE, 2005)

Visualization of Social Interactions in Facebook. - Takashi Okamoto; Kyle Buza (ICWSM, 2008)

B to C for Revitalizing Rural Economy. - Takashi Okamoto (SAINT, 2008)

Global optimization using a synchronization of multiple search Points autonomously driven by a chaotic dynamic model. - Takashi Okamoto; Eitaro Aiyoshi (J. Glob. Optim., 2008)

Information Sharing System for Maintenance of Sewage Facilities. - Takashi Okamoto (SAINT, 2009)

Constrained Optimization using the Lagrangian Method and the Improved Discrete Gradient Chaos Model. - Takashi Okamoto; Hironori Hirata (SMC, 2009)

The Study on Consumer Behavior of Online Shops. - Takashi Okamoto (SAINT, 2010)

Global optimization using a multi-point type quasi-chaotic optimization method with the simultaneous perturbation gradient approximation. - Takashi Okamoto; Hironori Hirata (SMC, 2010)

Using Choice Experiments to Value an Electronic Commerce. - Nobuyuki Soga; Takashi Okamoto (SAINT, 2011)

Constrained optimization using the quasi-chaotic optimization method with the exact penalty function and the sequential quadratic programming. - Takashi Okamoto; Hironori Hirata (SMC, 2011)

The robustness of a Nash equilibrium simulation model: Game-theoretic approach using variable metric projection method. - Eitaro Aiyoshi; Atsushi Maki; Takashi Okamoto (Math. Comput. Simul., 2011)

Japanese Students' Perception of B2C. - Takashi Okamoto (KMO, 2013)

Gamification of the Optimization Problem and Multi-point Type Optimization Methods. - Takashi Okamoto; Eitaro Aiyoshi (SMC, 2013)

Chaotic Optimization Method without Initial Sampling Parameter Tuning - Empirical Comparisons of Two Approaches in Various Problems. - Takashi Okamoto; Hironori Hirata (SMC, 2013)

Global optimization using a multipoint type quasi-chaotic optimization method. - Takashi Okamoto; Hironori Hirata (Appl. Soft Comput., 2013)

Consumer Priorities in Online Shopping. - Takashi Okamoto (KMO, 2014)

Constrained optimization using the chaotic sequential quadratic approximation type Lagrange quasi-Newton method. - Takashi Okamoto (SMC, 2014)

Visualization of Pareto optimal solutions using MIGSOM. - Naoto Suzuki; Takashi Okamoto; Seiichi Koakutsu (CEC, 2015)

Equilibrium Solution Search on a Selfish Routing Problem with Multiple Constraints Using the Variable Metric Gradient Projection Method. - Koichi Yoshida; Takashi Okamoto; Seiichi Koakutsu (SMC, 2015)

Realities and Ideals of Competencies: The Perceptual Gaps between Companies and University Students. - Takashi Okamoto; Nobuyuki Soga; Taro Kumagai; Hideo Arai (MISNC, 2016)

A Pareto optimal solution visualization method using SOM-NG with learning parameter optimization. - Yusuke Kobayashi; Takashi Okamoto; Seiichi Koakutsu (SMC, 2016)

Different perceptions of online shopping concerning product availability, consumer location, and experience. - Takashi Okamoto (Int. J. Web Eng. Technol., 2016)

A Pareto Optimal Solution Visualization Method Using an Improved Growing Hierarchical Self-Organizing Maps Based on the Batch Learning. - Naoto Suzuki; Takashi Okamoto; Seiichi Koakutsu (J. Adv. Comput. Intell. Intell. Informatics, 2016)

The Perceptual Gaps Between Companies' and University Students' Views on Fundamental Competencies. - Takashi Okamoto; Nobuyuki Soga; Taro Kumagai; Hideo Arai (Rev. Socionetwork Strateg., 2017)

Young People's Purchase Intentions in Online Flea Market. - Takashi Okamoto; Jiro Yatsuhashi; Naoki Mizutani (MISNC, 2018)

Effect of Magnet Shapes on Metal Contamination Removal. - Takashi Ohnishi; Takashi Okamoto; Keiichi Watanuki (CATA, 2019)

Japanese University Students' Acceptance of Cross-border Electronic Commerce. - Takashi Okamoto; Jiro Yatsuhashi; Naoki Mizutani (MISNC, 2019)

Consumers' Priorities for Online Flea Market. - Takashi Okamoto; Jiro Yatsuhashi; Naoki Mizutani (MISNC/IEMT, 2020)

Determinants of Purchase Intention in Online Purchasing During the COVID-19 Pandemic in Japan. - Takashi Okamoto (MISNC, 2021)

H2 Performance Analysis and Synthesis for Discrete-Time Linear Systems with Dynamics Determined by an i.i.d. Process. - Yohei Hosoe; Takashi Okamoto; Tomomichi Hagiwara (CoRR, 2022)

H₂ Performance Analysis and Synthesis for Discrete-Time Linear Systems With Dynamics Determined by an i.i.d. Process. - Yohei Hosoe; Takashi Okamoto; Tomomichi Hagiwara (IEEE Control. Syst. Lett., 2023)