| 2021 | WACV | Real-Time Gait-Based Age Estimation and Gender Classification from a Single Image. | Chi Xu, Yasushi Makihara, Ruochen Liao, Hirotaka Niitsuma, Xiang Li, Yasushi Yagi, Jianfeng Lu |
| 2018 | MEDES | Japanese sentiment analysis using simple alignment sentence classification. | Hirotaka Niitsuma, Daiki Kubota, Manabu Ohta |
| 2014 | APWEB | Prototype System for Visualizing Review Text Using Evaluative Expression Dictionaries. | Yuki Tanimoto, Hirotaka Niitsuma, Manabu Ohta |
| 2011 | MVA | Optimal Computation of 3-D Rotation under Inhomogeneous Anisotropic Noise. | Hirotaka Niitsuma, Kenichi Kanatani |
| 2010 | ACCV | Optimal Two-View Planar Scene Triangulation. | Kenichi Kanatani, Hirotaka Niitsuma |
| 2010 | ICPR | Hyper Least Squares and Its Applications. | Prasanna Rangarajan, Kenichi Kanatani, Hirotaka Niitsuma, Yasuyuki Sugaya |
| 2008 | BMVC | Triangulation from Two Views Revisited: Hartley-Sturm vs. Optimal Correction. | Kenichi Kanatani, Yasuyuki Sugaya, Hirotaka Niitsuma |
| 2006 | AAAI | Bayesian Network Based Reparameterization of Haar-like Feature. | Hirotaka Niitsuma |
| 2005 | PAKDD | Covariance and PCA for Categorical Variables. | Hirotaka Niitsuma, Takashi Okada |
| 2003 | KES | A Trainable Object-Detection Method Using Equivalent Retinotopical Sampling and Fisher Kernel. | Hirotaka Niitsuma |