Saiki Yoshitaka

Profile Information

Affiliation: Professor, Graduate School of Business Administration, Hitotsubashi University
: (Concurrent)Faculty of Commerce and Management

Degree: PhD(Mar, 2006, The University of Tokyo)

ORCID iD: https://orcid.org/0000-0002-3184-0577
J-GLOBAL ID: 200901038458952308
researchmap Member ID: 5000045292

External link: http://saiki.hub.hit-u.ac.jp/

Major Research Interests

Research Areas

Major Research History

Apr, 2020 - Present

Professor, Graduate School of Business Administration, Hitotsubashi University

Major Education

- Mar, 2006

Graduate School of Mathematical Sciences, The University of Tokyo

Major Papers

Data-driven ODE modeling of high-frequency complex dynamics via a low-frequency dynamics model

Natsuki Tsutsumi, Kengo Nakai, Yoshitaka Saiki

Physical Review E, 111 014212, Jan 7, 2025 Peer-reviewed
Laminar chaotic saddle within a turbulent attractor

Hibiki Kato, Miki U Kobayashi, Yoshitaka Saiki, James A. Yorke

Physical Review E, 110(5) L052202, Nov 7, 2024 Peer-reviewed
Synchronization analysis between exchange rates on the basis of purchasing power parity using the Hilbert transform

Makoto Muto, Yoshitaka Saiki

The North American Journal of Economics and Finance, 74 102191-102191, Oct 6, 2024 Peer-reviewed
Lyapunov analysis of data-driven models of high dimensional dynamics using reservoir computing: Lorenz-96 system and fluid flow

Miki U Kobayashi, Kengo Nakai, Yoshitaka Saiki

Journal of Physics: Complexity, Jun 17, 2024 Peer-reviewedInvited
Characterizing small-scale dynamics of Navier-Stokes turbulence with transverse Lyapunov exponents: A data assimilation approach

Masanobu Inubushi, Yoshitaka Saiki, Miki U. Kobayashi, Susumu Goto

Physical Review Letters, 131(25) 254001, Dec 22, 2023 Peer-reviewed
Constructing low-dimensional ordinary differential equations from chaotic time series of high- or infinite-dimensional systems using radial-function-based regression

Natsuki Tsutsumi, Kengo Nakai, Yoshitaka Saiki

Physical Review E, 108(5) 054220, Nov 22, 2023 Peer-reviewed
Hausdorff dimension of Cantor intersections and robust heterodimensional cycles for heterochaos horseshoe maps

Yoshitaka Saiki, Hiroki Takahasi, James A. Yorke

SIAM Journal on Applied Dynamical Systems, 22(3) 1852-1876, Jul 28, 2023 Peer-reviewed
Can the Flap of a Butterfly’s Wings Shift a Tornado into Texas—Without Chaos?

Yoshitaka Saiki, James A. Yorke

Atmosphere, 14(5) 821-821, May 2, 2023 Peer-reviewedInvited
Regional Synchronization during Economic Contraction: The Case of the U.S. and Japan

M. Muto, T. Onozaki, Y. Saiki

Applied Economics, 55(30) 3472-3486, May 1, 2023 Peer-reviewed
The twisted baker map

Y. Saiki, H. Takahasi, J. A. Yorke

Nonlinearity, 36(3) 1776-1788, Feb 7, 2023 Peer-reviewed
Constructing differential equations using only a scalar time-series about continuous time chaotic dynamics

N. Tsutsumi, K. Nakai, Y. Saiki

Chaos, 32(9) 091101, Sep 12, 2022 Peer-reviewed
Dynamical system analysis of a data-driven model constructed by reservoir computing (jointly worked)

M. U. Kobayashi, K. Nakai, Y. Saiki, N. Tsutsumi

Physical Review E, 104(4) 044215, Oct, 2021 Peer-reviewed
Piecewise-linear maps with heterogeneous chaos (jointly worked)

Y. Saiki, H. Takahasi, J. A. Yorke

Nonlinearity, 34(8) 5744, Jul, 2021 Peer-reviewed
Machine-learning construction of a model for a macroscopic fluid variable using the delay-coordinate of a scalar observable (jointly worked)

Kengo Nakai, Yoshitaka Saiki

Discrete and Continuous Dynamical System S, 14(3) 1079-1092, Mar, 2021 Peer-reviewed
Solving the Babylonian Problem of quasiperiodic rotation rates (jointly worked)

S. Das, Y. Saiki, E. Sander, J. A. Yorke

Discrete and Continuous Dynamical Systems Series S, 12(8) 2279-2305, Dec, 2019 Peer-reviewed
Quasiperiodic orbits in Siegel disks/balls and the Babylonian problem (jointly worked)

Yoshitaka Saiki, James A. Yorke

Regular and Chaotic Dynamics, 23(6), Dec, 2018 Peer-reviewed
Low-dimensional paradigms for high-dimensional hetero-chaos (jointly worked)

Yoshitaka Saiki, Miguel F. Sanjuan, James A. Yorke

Chaos, 28 103110, Oct, 2018 Peer-reviewed
Machine-learning inference of fluid variables from data using reservoir computing (jointly worked)

Kengo Nakai, Yoshitaka Saiki

Physical Review E, 98 023111, Aug, 2018 Peer-reviewed
Intermittent transition between synchronization and desynchronization in multi-regional business cycles

Kunihiko Esashi, Tamotsu Onozaki, Yoshitaka Saiki, Yuzuru Sato

Structural Change and Economic Dynamics, 44 68-76, Mar 1, 2018 Peer-reviewed
Empirical evaluated SDE modelling for dimensionality reduction systems and its predictability estimates (jointly worked)

N. Nakano, M. Inatsu, S. Kusuoka, Y. Saiki

Japan Journal of Industrial and Applied Mathematics, 35(2) 553-589, Feb, 2018 Peer-reviewed
Quantitative quasiperiodicity

Suddhasattwa Das, Yoshitaka Saiki, Evelyn Sander, James A. Yorke

NONLINEARITY, 30(11) 4111-4140, Nov, 2017 Peer-reviewed
Network analysis of chaotic systems through unstable periodic orbits

Miki U. Kobayashi, Yoshitaka Saiki

CHAOS, 27(8) 081103:1-6, Aug, 2017 Peer-reviewed
Generalized Lorenz equations on a three-sphere

Yoshitaka Saiki, Evelyn Sander, James A. Yorke

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS, 226(9) 1751-1764, Jun, 2017 Peer-reviewed
Measuring quasiperiodicity (jointly worked)

S. Das, C. B. Dock, Y. Saiki, M. Salgado-Flores, E. Sander, J. Wu, J. A. Yorke

Europhysics Letters, 114 40005, Jun, 2016 Peer-reviewed
Reconstruction of chaotic saddles by classification of unstable periodic orbits: Kuramoto-Sivashinsky equation

Yoshitaka Saiki, Michio Yamada, Abraham C. -L. Chian, Rodrigo A. Miranda, Erico L. Rempel

CHAOS, 25(10) 103123, Oct, 2015 Peer-reviewed

Misc.

On the relations between statistical values along unstable periodic orbits in differential equation systems (Nonlinear Dynamics in Macro-economics)

SAIKI Yoshitaka, YAMADA Michio

1768 143-149, Oct, 2011
28pQD-6 Mechanism of a temporal intermittency in the shell model turbulence

Kobayashi M. U., Yamada M., Saiki Y.

Meeting abstracts of the Physical Society of Japan, 64(2) 245-245, Aug 18, 2009

Major Professional Memberships

Major Research Projects

New Developments in Fluid Dynamics Research Based on Dynamical Systems Theory

Grants-in-Aid for Scientific Research, Kiban B, JSPS, Apr, 2024 - Mar, 2028

Yoshitaka Saiki, Hiroki Takahasi, Hiroshi Kokubu
Data-driven modeling of ordinary differential equations using regression

Grants-in-Aid for Scientific Research, Grant-in-Aid for Transformative Research Areas (A), Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2025

Yoshitaka Saiki
Dynamical System and reservoir computing

Japan, Jul, 2022 - Mar, 2024

Yoshitaka Saiki
Expediting and Elaborating Business Forecast Using Machine Learning

Grants-in-Aid for Scientific Research, Grant-in-Aid for Challenging Research (Exploratory), Japan Society for the Promotion of Science, Jul, 2021 - Mar, 2024
Intermittency due to hetero-chaotic property and its inference

Grants-in-Aid for Scientific Research, Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), Japan Society for the Promotion of Science, Oct, 2019 - Mar, 2023
Fast Computation of Birkhoff Average along a Quasi-periodic Orbit and its Applications

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2020

SAIKI Yoshitaka
Construction of a synchronization theory based on hetero-dimensional cycle: Toward an understanding of complex phenomena

Strategic Basic Research Programs, PRESTO, JST(Japan Science and Technology Agency), Oct, 2016 - Mar, 2020

Profile Information

Major Research Interests

Research Areas

Major Research History

Major Education

Major Papers

Misc.

Major Professional Memberships

Major Research Projects

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