I have been working on studies of modeling techniques and algorithms on continuous optimization and related problems. Especially, I am interested in their numerical aspect. My research interest also includes their applications to various branches of science and engineering: machine learning, data analysis, maritime affairs, supply chain, polymer chemistry, etc.

I joined the Institute of Statistical Mathematics (ISM) in 2017 as an assistant professor.
The name of our institute is not the Institute of Mathematical Statistics.
The words *statistical mathematics* may be obsolete but are not error.
In fact, A. C. Aitken published a book entitled *Statistical Mathematics* in 1939.
This is prior to the foundation of our institute in 1944.
In my understanding, statistical mathematics is defined as mathematical sciences related to statistics.
So, statistical mathematics is a superset of mathematical statistics and they are not equal to each other.
That is a reason why I can work at ISM.
If it was IMS, I would not be here.

Prior to joining ISM, I studied at Tokyo Institute of Technology (2006--2014) and received my PhD degree.
I have a lot of fun memories in TokyoTech.
I studied well enjoying freedom.
After the precious days, I worked for a private university in Japan (2014--2017).
The university has the word *Tokyo* in its name but my office was located outside of Tokyo.
It was a great experience because I was brought up only in metropolitan cities, Tokyo and Yokohama.
I learned enormous amounts from there and I have become a harmless tough guy.
So, I really would like to thank the excellent university.

- Office: D614B, The General Research Building, The Institute of Statistical Mathematics, 10-3 Midori-cho, Tachikawa, Tokyo, Japan
- Mail: Mirai Tanaka, Department of Statistical Inference and Mathematics, The Institute of Statistical Mathematics, 10-3 Midori-cho, Tachikawa, Tokyo 190-8562, Japan
- E-mail: mirai ( ` · Θ · ´ ) ism.ac.jp

- M. Ito, S. Hara,
__M. Tanaka__, and R. Takashima:

Examination-order scheduling for minimizing waiting time: A case study of a medical checkup,

*Operations Research for Health Care***22**(2019) 100190. - M. Ogawa,
__M. Tanaka__, X.-N. Lu, and T. Suzuki:

Evaluation of the accuracy of ordinal classifications using item response theory,

*Total Quality Science***4**(2018) 22--33. - T. Iwasawa, X.-N. Lu,
__M. Tanaka__, and T. Suzuki:

Robust defect detection method for improving inspection process,

*Total Quality Science***4**(2018) 13--21. - T. Mizutani and
__M. Tanaka__:

Efficient preconditioning for noisy separable nonnegative matrix factorization problems by successive projection based low-rank approximations,

*Machine Learning***107**(2018) 643--637. - Y. Bando, N. Sano,
__M. Tanaka__, and T. Suzuki:

Improving adaptive pairing method in incomplete paired comparison design,

*Total Quality Science***3**(2017) 59--68. - K. Yoshida, T. Iwasawa, N. Sano,
__M. Tanaka__, and T. Suzuki:

Construction of defect detection system for image data using machine learning and image processing,

*Total Quality Science***3**(2017) 46--58. - R. Suzuki, M. Saito, Y. Hayashi, M. Saito, T. Yajima, N. Sano,
__M. Tanaka__, and T. Suzuki:

Statistical analysis of influenza propagation pattern using prescription data from Tochigi Prefecture,

*Total Quality Science***3**(2017) 35--45. - T. Iwasawa, K. Yoshida, N. Sano,
__M. Tanaka__, and T. Suzuki:

Defect detection for improving inspection process using orthogonal array: A case study of cylindrical metal products,

*Total Quality Science***3**(2017) 11--21. __M. Tanaka__and K. Kobayashi:

A route generation algorithm for an optimal fuel routing problem between two single ports,

*International Transactions in Operational Research***26**(2019) 529--550.__M. Tanaka__, T. Yamashita, N. Sano, A. Ishigaki, and T. Suzuki:

Mathematical optimization approach for estimating the quantum yield distribution of a photochromic reaction in a polymer,

*AIP Advances***7**(2017) 015041.__M. Tanaka__and K. Nakata:

Successive projection method for well-conditioned matrix approximation problems,

*IEEE Signal Processing Letters***21**(2014) 418--422.__M. Tanaka__, K. Nakata, and H. Waki:

Numerical reduction method for doubly nonnegative optimization problems,

*Journal of Math-for-Industry***5A**(2013) 41--50.__M. Tanaka__and K. Nakata:

Positive definite matrix approximation with condition number constraint,

*Optimization Letters***8**(2014) 939--947.__M. Tanaka__, K. Nakata, and H. Waki:

Application of a facial reduction algorithm and an inexact primal-dual path-following method for doubly nonnegative relaxation for mixed binary nonconvex quadratic optimization problems,

*Pacific Journal of Optimization***8**(2012) 699--724.

- K. Fukumizu, S. Yamaguchi, Y. Mototake, and
__M. Tanaka__:

Semi-flat minima and saddle points by embedding neural networks to overparameterization,

to appear in*Advances in Neural Information Processing Systems 32,*2019 (arXiv:1906.04868). - K. Kawakami and
__M. Tanaka__:

Ship routing problem with berthing time clash avoidance constraints and minimizing demurrage,

in*Proceedings of the Tenth Triennial Symposium on Transportation Analysis,*pp. 454--457, 2019. - M. Tatsukawa and
__M. Tanaka__:

Box constrained low-rank matrix approximation with missing values,

in*Proceedings of the 7th International Conference on Operations Research and Enterprise Systems,*pp. 78--84, 2018. - M. Ogawa,
__M. Tanaka__, and T. Suzuki:

Evaluation of accuracy of ordinal classiﬁcations using item response theory,

in*Proceedings of the 15th Asian Network for Quality Congress,*pp. 45--56, 2017. - T. Iwasawa, X.-N. Lu,
__M. Tanaka__, and T. Suzuki:

Robust defect detection for automatic inspection system,

in*Proceedings of the 15th Asian Network for Quality Congress,*pp. 18--26, 2017. - Y. Bando, N. Sano,
__M. Tanaka__, and T. Suzuki:

Evaluation of relationship between pairing and number of rounds in Swiss system tournament,

in*Proceedings of the 14th Asian Network for Quality Congress,*C4_(JP-20), USB flash drive, 2016. - Y. Li, N. Sano,
__M. Tanaka__, and T. Suzuki:

A study on the measurement precision of the binary data,

in*Proceedings of the 14th Asian Network for Quality Congress,*C2_(JP-35), USB flash drive, 2016. - T. Iwasawa, N. Sano,
__M. Tanaka__, and T. Suzuki:

Defect detection from image data with feature extraction using orthogonal array,

in*Proceedings of the 14th Asian Network for Quality Congress,*C2_(JP-17), USB flash drive, 2016. - R. Suzuki, Y. Hayashi, N. Sano,
__M. Tanaka__, and T. Suzuki:

Statistical analysis of influenza spreading pattern using pharmaceutical data in Tochigi prefecture, Japan,

in*Proceedings of the 14th Asian Network for Quality Congress,*B5_(JP-07), USB flash drive, 2016. - K. Yoshida, N. Sano,
__M. Tanaka__, and T. Suzuki:

Defect detection for image data using machine learning and image processing,

in*Proceedings of the 14th Asian Network for Quality Congress,*B2_(JP-26), USB flash drive, 2016. - J. Ono, N. Sano,
__M. Tanaka__, and T. Suzuki:

Analysis of winning percentage in sports based on a statistical model,

in*Proceedings of the 14th Asian Network for Quality Congress,*A5_(JP-16), USB flash drive, 2016. - T. Suzuki, T. Iwasawa, K. Yoshida, N. Sano, and
__M. Tanaka__:

Integrating statistical and machine learning approaches in improving inspection process,

in*Proceedings of the 12th International Workshop on Intelligent Statistical Quality Control 2016,*pp. 251--259, 2016. __M. Tanaka__, T. Kimata, and T. Arai:

Estimation of passenger origin-destination matrices and efficiency evaluation of public transportation,

in*Proceedings of IIAI 5th International Congress on Advanced Applied Informatics,*pp. 1146--1150, 2016.__M. Tanaka__and K. Kobayashi:

Perspective reformulation for optimal fuel routing problem,

in*Proceedings of International Symposium on Scheduling 2015,*pp. 89--94, 2015.

- T. Okuno and
__M. Tanaka__:

Extension of the LP-Newton method to SOCPs via semi-infinite representation,

submitted (arXiv:1902.01004). __M. Tanaka__and A. Takeda:

Efficient iterative algorithm for constrained nonconvex sparse optimization,

submitted.

- T. Okuno and
__M. Tanaka__:

Adaptive LP-Newton method for second-order cone optimization problem,

*The 4th ISM-ZIB-IMI MODAL Workshop on Mathematical Optimization and Data Analysis,*The Institute of Statistical Mathematics, March 2019. __M. Tanaka__:

Efficient iterative algorithm for constrained nonconvex sparse optimization,

*The 3rd IMI-ISM-ZIB MODAL Workshop on Challenges in Real World Data Analytics and High-Performance Optimization,*National Graduate Institute for Policy Studies, September 2018.__M. Tanaka__and A. B. Zemkoho:

DC algorithm for fully convex bilevel optimization,

*The 23rd International Symposium on Mathematical Programming,*Université de Bordeaux, July 2018.__M. Tanaka__:

DC algorithm for convex constrained nonconvex regularized sparse optimization problem,

*The 2018 HKBU-ISM Joint Workshop for Mathematical Data Science,*Hong Kong Baptist University, March 2018.__M. Tanaka__:

Splitting algorithms for logarithmic regularized least squares over the standard simplex,

*The 2017 HKBU-ISM Joint Workshop for Mathematical Data Science,*The Institute of Statistical Mathematics, May 2017.- T. Maehara and
__M. Tanaka__:

Extracting diversity via condition number constrained matrix factorization,

*The Fifth International Conference on Continuous Optimization,*Wed.B.5K, National Graduate Institute for Policy Studies, August 2016. __M. Tanaka__, T. Kimata, and T. Arai:

Estimation of passenger origin-destination matrices and efficiency evaluation of public transportation,

*IIAI 5th International Congress on Advanced Applied Informatics,*SISS/SISS-SS1, Kumamoto City International Center, July 2016.__M. Tanaka__, T. Yamashita, M. Nagata, N. Sano, A. Ishigaki, and T. Suzuki:

Mathematical optimization model for estimating quantum yield distribution in photochromic reaction,

*22nd International Symposium on Mathematical Programming*, MF04, Wyndham Grand Pittsburgh Downtown, July 2015.__M. Tanaka__and K. Kobayashi:

Perspective reformulation for optimal fuel routing problem,

*International Symposium on Scheduling 2015*, 3A1, Kobe Industrial Promotion Center Convention Hall, July 2015.__M. Tanaka__and K. Kobayashi:

MISOCP formulation and route generation algorithm for ship navigation problem,

*The 9th International Conference on Optimization: Techniques and Applications*, SA-1, National Taiwan University of Science and Technology, December 2013.__M. Tanaka__and K. Nakata:

On the positive definite matrix approximation problem with condition number constraint,

*The Fourth International Conference on Continuous Optimization*, Wed.B.11, Universidade Nova de Lisboa, July 2013.__M. Tanaka__, K. Nakata, and H. Waki:

Numerical computation of a facial reduction algorithm for doubly nonnegative optimization problems,

*INFORMS Annual Meeting 2012*, TB13, Phoenix Convention Center, October 2012.__M. Tanaka__, K. Nakata, and H. Waki:

Numerical computation of a facial reduction algorithm and an inexact primal-dual path-following method for doubly nonnegative optimization problems,

*The 21st International Symposium on Mathematical Programming*, Fri.1, Technische Universität Berlin, August 2012.__M. Tanaka__, K. Nakata, and H. Waki:

An effective approach for DNN relaxation problems for mixed binary nonconvex quadratic optimization,

*INFORMS Optimization Society Conference 2012*, FD02, University of Miami, February 2012.

__M. Tanaka__, T. Yamashita, M. Nagata, N. Sano, A. Ishigaki, and T. Suzuki:

Mathematical optimization approach for estimating quantum yield distribution in photochromic reaction,

*The 12th International Conference on Materials Chemistry*, University of York, July 2015.

- Apr 2018--Today: Assistant Professor at Mathematical Optimization Group, Department of Statistical Inference and Mathematics, The Institute of Statistical Mathematics
- Dec 2017--Today: Visiting Scientist at Continuous Optimization Team, Center for Advanced Intelligence Project, RIKEN
- May 2017--Today: Assistant Professor at Research Center for Statistical Machine Learning, The Institute of Statistical Mathematics
- Apr 2017--Today: Assistant Professor at Department of Statistical Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies
- Apr 2017--Mar 2018: Assistant Professor at Computational Inference Group, Department of Mathematical Analysis and Statistical Inference, The Institute of Statistical Mathematics
- Apr 2014--Mar 2017: Assistant Professor at Department of Industrial Administration, Faculty of Science and Technology, Tokyo University of Science
- Apr 2012--Mar 2013: Part-time Lecturer at Tokyo Tech High School of Science and Technology

- Oct 2017--Nov 2017: Visiting Academic at University of Southampton

- Mar 2014: Doctor of Engineering from Department of Industrial Engineering and Management, Graduate School of Decision Science and Technology, Tokyo Institute of Technology
- Mar 2011: Master of Engineering from Department of Industrial Engineering and Management, Graduate School of Decision Science and Technology, Tokyo Institute of Technology
- Mar 2009: Bachelor of Engineering from Department of Industrial and Systems Engineering, Faculty of Engineering, Tokyo Institute of Technology

- 2015--Today: Society for Industrial and Applied Mathematics, Member
- 2014--Today: Mathematical Optimization Society, Member
- 2016--2017: IIAI 2nd International Conference on Social Informatics and Systems Science, Conference Chair
- 2016: The 5th International Conference on Continuous Optimization, Local Organizing Committee
- 2016: IIAI 1st International Conference on Social Informatics and Systems Science, Program Committee
- 2014--2015: International Symposium on Scheduling 2015, International Program Committee
- 2014: The 15th IEEE/ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing, Program Committee