Profile
I am a researcher at Communication Science Laboratories, NTT, Inc. My research interests include mathematical optimization and its applications to control, machine learning, and other fields.
Contact
mitsuaki.obara [at] ntt.com
mitsuaki_obara [at] mist.i.u-tokyo.ac.jp
News
- Apr. 2026: One paper has been accepted by ACM Transactions on Economics and Computation.
- Apr. 2026: Joined NTT, Inc. as a researcher.
- Mar. 2026: Received a Ph.D. from The University of Tokyo.
- Oct. 2025: One paper has been accepted by Journal of Optimization Theory and Applications.
- Jun. 2025: Received the Outstanding Presentation Award from the Research Association of Optimization Theory and Algorithms.
- May 2025: Updated the paper entitled “A primal-dual interior point trust region method for second-order stationary points of Riemannian inequality-constrained optimization problems” and uploaded “Local near-quadratic convergence of Riemannian interior point methods” to arXiv. The previous manuscript was expanded with additional analyses and split into these two articles.
- Jan. 2025: New preprint “A primal-dual interior point trust region method for inequality-constrained optimization problems on Riemannian manifolds” is available on arXiv.
- Apr. 2024: Selected as a recipient of the Research Encouragement Special Allowance based on research activities during the JSPS DC fellowship.
- Sep. 2023: One paper has been accepted by IEEE Transactions on Automatic Control.
- Apr. 2022: Took a leave of absence due to suspected Long COVID.
- Dec. 2021: Received the Excellent Presentation Award at the GCL/IIW Ph.D. Student Poster Session.
- Dec. 2021: New preprint “Stable linear system identification with prior knowledge by elastic Riemannian sequential quadratic optimization” is available on arXiv.
- Dec. 2021: One paper has been accepted by SIAM Journal on Optimization.
- Sep. 2021: Received the Student Thesis Award from the Operations Research Society of Japan.
- May 2021: My research interview is available on YouTube.
- May 2021: My research is featured on RIISE, UTokyo.
- Apr. 2021: Started my Ph.D. program at the University of Tokyo. Also, working a JSPS Research Fellow (DC1).
- Nov. 2020: A research proposal was selected for Sprouting Research in Value Exchange Engineering at RIISE, UTokyo.
- Sep. 2020: New preprint “Sequential quadratic optimization for nonlinear optimization problems on Riemannian manifolds” is available on arXiv.
- Mar. 2020: Launched the website.