Yasunori Kimura
Professor
Department of Information Science
Faculty of Science
Toho University
Research Interests
 SetValued Analysis
 Nonlinear Functional Analysis
Conference Calendar
2022
2021
 (POSTPONED)
Projection
Algorithms: Stefan Kaczmarz 125th birthday anniversary, Bedlewo
Conference Center, Bedlewo, Poland.
 April 911, 2021,
International Conference on
Analysis and Its Applications 2021 (ICAA_NEPAL_2021),
Kathmandu University, Dhulikhel, Nepal (ONLINE).
 March 2931, 2021,
International Symposium
on Computational Operations Research and Algorithmic Game Theory,
Indian Statistical Institute, Delhi, India (ONLINE).
 March 2627, 2021, Virtual International Conference on Soft Computing, Optimization Theory and Applications (SCOTA 2021),
Birla Institute of Technology Mesra, Ranchi, India (ONLINE).
2020
 (POSTPONED)
International
Conference on Nonlinear Operators, Differential Equations and
Applications,
BabesBolyai University, ClujNapoca, Romania.
 (POSTPONED)
Projection
Algorithms: Stefan Kaczmarz 125th birthday anniversary, Bedlewo
Conference Center, Bedlewo, Poland.
 (POSTPONED)
The 11th Asian
Conference on Fixed Point Theory and Optimization 2020, Siam
Bayshore Hotel, Pattaya, Thailand.
 (POSTPONED)
International Conference on
Analysis and Its Applications 2020 (ICAA_NEPAL_2020),
Kathmandu University, Dhulikhel, Nepal.
2019
 December 1416, 2019,
International Conference on
Mathematical Analysis and Its Applications (ICMAA2019),
South Asian University, New Delhi, India.
 September 1114, 2019,
International
Workshop on Applied Nonlinear Analysis (IWANA2019), Tide
Resort, Bangsean, Thailand.
 August 2631, 2019,
International
Conference on Nonlinear Analysis and Convex
AnalysisInternational Conference on Optimization: Techniques
and Applications (NACAICOTA2019), Future University Hakodate,
Hakodate, Japan.
 July 913, 2019,
The 13th International
Conference on Fixed Point Theory and Its Applications
(ICFPTA2019), Henan Normal University, Xinxiang, China.
 March 1517, 2019,
International
Workshop on Fixed Point Theory and Its Applications, Jamia
Millia Islamia, Delhi, India.
2018
 November 59, 2018,
The 6th Asian Conference on Nonlinear Analysis and Optimization (NAOAsia2018), Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan.
 July 1618, 2018,
The 10th Asian Conference on Fixed Point Theory and Optimization (ACFPTO2018), The Empress Hotel, Chiang Mai, Thailand.
 July 79, 2018,
International Workshop on Nonlinear Analysis and its Applications, Granada University, Granada, Spain.
 January 911, 2018
International Symposium on Operations Research and Game Theory: Modeling and Computation, Indian Statistical Institute, Delhi, India.
2017
 August 1418, 2017,
11th ISAAC Congress, Linnaeus University, Växjö, Sweden.
 July 49, 2017
The 10th Anniversary Conference on
Nonlinear Analysis and Convex Analysis (NACA2017), Chitose City Cultural Center, Chitose, Japan.
 January 911, 2017,
2017 Symposium on Mathematical Programming and Game Theory, Indian Statistical Institute, Delhi, India.
2016
 November 1517, 2016,
International Conference on Differential Geometry, Algebra and Analysis (ICDGAA16), Jamia Millia Islamia, Delhi, India.
 August 16, 2016,
The Fifth Asian conference on Nonlinear Analysis and Optimization (NAOAsia2016), Toki Messe, Niigata, Japan.
 May 1820, 2016,
The 9th Asian Conference on Fixed point theory and Optimization (ACFPTO2016), King Mongkut's University of Technology Thonburi, Bangkok, Thailand.
Publication
Articles in Journals
 Y. Kimura, K. Nakagawa, and H. Wada, Halpern iteration with
two kinds of mappings in a complete geodesic space with curvature
bounded above, Linear and Nonlinear Analysis 6
(2020), 91101.
 Y. Kimura and K. Sasaki, A Halpern type iteration with
multiple anchor points in complete geodesic spaces with negative
curvature, Fixed Point Theory 21 (2020), 631646.
 H. Hirono and Y. Kimura, Halpern type iteration with two
mappings in a complete geodesic space, Fixed Point Theory
21 (2020), 549560.
 Y. Kimura, Explicit and implicit iterative schemes with
balanced mappings in Hadamard spaces, Thai Journal of
Mathematics, 18 (2020), 425434.
 T. Kajimura and Y. Kimura, A spherically vicinal mapping on
geodesic spaces with curvature bounded above, Thai Journal of
Mathematics, 18 (2020), 384393.
 T. Kajimura and Y. Kimura, The proximal point algorithm in
complete geodesic spaces with negative curvature,
Advances in the Theory of Nonlinear Analysis and its Applications
3 (2019), 192200.
 T. Kajimura and Y. Kimura, Resolvents of convex functions in
complete geodesic metric spaces with negative curvature, Journal
of Fixed Point Theory and Applications 21 (2019), 15 pp.
 Y. Kimura and K. Nakajo, Strong convergence for a modified
forwardbackward splitting method in Banach spaces, Journal of
Nonlinear and Variational Analysis 3 (2019), 518.
 Y. Kimura and F. Kohsaka, Two modified proximal point
algorithms in geodesic spaces with curvature bounded above,
Rendiconti del Circolo Matematico di Palermo Series II 68
(2019), 83104.
 T. Hasegawa and Y. Kimura, Convergence to a fixed point of a
balanced mapping by the Mann algorithm in a Hadamard space,
Linear and Nonlinear Analysis 4 (2018), 405412.
 Y. Kimura and Y. Kishi, Equilibrium problems and their
resolvents in Hadamard spaces, Journal of Nonlinear and Convex
Analysis 19 (2018), 15031513.
 Y. Kimura, An approximation method with nonsummable errors
for convex minimization problems, Linear and Nonlinear Analysis,
3 (2017), 401407.
 Y. Kimura and K. Satô, The existence of nonexpansive
extension on a geodesic space with constant curvature, Journal
of Nonlinear and Convex Analysis 18 (2017), 123136.
 Y. Kimura and F. Kohsaka, The proximal point algorithm in
geodesic spaces with curvature bounded above,
Linear and Nonlinear Analysis, 3 (2017), 133148.
 Y. Kimura and H. Wada, Iterative methods for nonexpansive
mappings on Hadamard spaces and their coefficient conditions,
Linear and Nonlinear Analysis 2 (2016), 253261.
 T. Ibaraki and Y. Kimura, Approximation of a fixed point of
generalized firmly nonexpansive mappings with nonsummable
errors, Linear and Nonlinear Analysis 2
(2016), 301310.
 Y. Kimura and F. Kohsaka, Two modified proximal point
algorithms for convex functions in Hadamard spaces, Linear and
Nonlinear Analysis 2 (2016), 6986.
 Y. Kimura, A shrinking projection method for nonexpansive
mappings with nonsummable errors in a Hadamard space, Annals of
Operations Research 243 (2016), 8994.
 S. Huang and Y. Kimura, A projection method for
approximating fixed points of quasinonexpansive mappings in Hadamard
spaces, Fixed Point Theory and Applications, 2016
(2016), 13 pages.
 Y. Kimura and F. Kohsaka, Spherically nonspreading mappings
in geodesic spaces with curvature bounded above by one,
Journal of Fixed Point Theory and Applications
18 (2016), 93115.
 Y. Kimura and K. Satô, Approximation of a common fixed point
in a geodesic space with curvature bounded above, Journal
of Nonlinear and Convex Analysis 16 (2015),
22272234.
 Y. Kimura and S. Saejung, Strong convergence for a common
fixed point of two different generalizations of cutter
operators, Linear and Nonlinear
Analysis 1 (2015), 5365.
 S. Akashi, Y. Kimura, and W. Takahashi, Strongly convergent
iterative methods for generalized split feasibility problems in
Hilbert spaces, Journal of Convex
Analysis 22 (2015), 917938.
 Y. Kimura and H. Wada, Halpern type iteration with multiple
anchor points in a Hadamard space, Journal of Inequalities and
Applications 2015 (2015), 11 pages.
 Y. Kimura and K. Nakajo, Strong convergence to a solution
of a variational inequality problem in Banach spaces, Journal of
Applied Mathematics 2014 (2014), Article ID 346517, 10
pages.
 K. Aoyama and Y. Kimura, Viscosity approximation methods
with a sequence of contractions, Cubo, A Mathematical Journal
16 (2014), 920.
 Y. Kimura and K. Nakagawa, Another type of Mann iterative
scheme for two mappings in a complete geodesic space, Journal of
Inequalities and Applications, 2014:72 (2014), 9
pages.
 Y. Kimura, Approximation of a common fixed point of a finite
family of nonexpansive mappings with nonsummable errors in a
Hilbert space, Journal of Nonlinear and Convex Analysis
15 (2014), 429436.
 Y. Kimura, S. Saejung, and P. Yotkaew, The Mann algorithm
in a complete geodesic space with curvature bounded above, Fixed
Point Theory and Applications 2013:336 (2013), 13
pages.
 Y. Kimura and K. Nakajo, The problem of image recovery by
the metric projections in Banach spaces, Abstract and Applied
Analysis, 2013 (2013), Article ID 817392, 6 pages.
 Y. Kimura and K. Satô, Halpern iteration for strongly
quasinonexpansive mappings on a geodesic space with curvature
bounded above by one, Fixed Point Theory and Applications
2013 (2013), 14 pages.
 Y. Kimura and K. Satô, Two convergence theorems to a fixed
point of a nonexpansive mapping on the unit sphere of a Hilbert
space, Filomat 26 (2012), 949955.
 Y. Kimura and K. Satô, Convergence of subsets of a
complete geodesic space with curvature bounded above, Nonlinear
Analysis: Theory, Methods & Applications 75 (2012),
50795085.
 K. Aoyama, Y. Kimura, and F. Kohsaka, Strong convergence
theorems for strongly relatively nonexpansive sequences and
applications, Journal of Nonlinear Analysis and Optimization:
Theory & Applications 3 (2012), 6777.
 Y. Kimura and K. Nakajo, Viscosity approximations by the
shrinking projection method in Hilbert spaces, Computers &
Mathematics with Appications 63 (2012), 14001408.
 Y. Kimura, Shrinking projection methods for a family of
maximal monotone operators, Nonlinear Functional Analysis and
Applications 16 (2011), 481489.
 K. Aoyama and Y. Kimura, Strong convergence theorems for
strongly nonexpansive sequences, Applied Mathematics and
Computation 217 (2011), 75377545.
 T. Ibaraki and Y. Kimura, Convergence of nonlinear
projections and shrinking projection methods for common fixed
point problems, Journal of Nonlinear Analysis and Optimization
2 (2011), 209222.
 Y. Kimura, W. Takahashi, and J. C. Yao, Strong convergence
of an iterative scheme by a new type of projection method for a
family of quasinonexpansive mappings, Journal of Optimization
Theory and Applications 149 (2011), 239253.
 Y. Kimura, Convergence of a sequence of sets in a Hadamard
space and the shrinking projection method for a real Hilbert
ball, Abstract and Applied Analysis 2010
(2010), Article ID 582475, 11 pages.
 Y. Kimura and K. Nakajo, Some characterizations for a
family of nonexpansive mappings and convergence of a generated
sequence to their common fixed point, Fixed Point
Theory and Applications 2010 (2010), Article
ID 732872, 16 pages.
 Y. Kimura, Further improvement of a coefficient condition
for a weakly convergent iterative scheme, Nonlinear Analysis
Series A: Theory, Methods & Applications 71 (2009),
e2023e2027.
 Y. Kimura, K. Nakajo, and W. Takahashi, Convexity of the set
of fixed points of a quasipseudocontractive type Lipschitz
mapping and the shrinking projection method, Scientiae
Mathematicae Japonicae 70 (2009), 213220.
 Y. Kimura and W. Takahashi, On a hybrid method for a family
of relatively nonexpansive mappings in a Banach space,
Journal of Mathematical Analysis and
Applications 357 (2009), 356363.
 Y. Kimura, K. Nakajo, and W. Takahashi, Strongly convergent
iterative schemes for a sequence of nonlinear mappings, Journal
of Nonlinear and Convex Analysis 9 (2008), 407416.
 Y. Kimura and W. Takahashi, A generalized proximal point
algorithm and implicit iterative schemes for a sequence of
operators on Banach spaces, SetValued
Analysis 16 (2008), 597619.
 K. Aoyama, Y. Kimura, and W. Takahashi, Maximal monotone
operators and maximal monotone functions for equilibrium
problems, Journal of Convex Analysis 15
(2008), 395409.
 K. Aoyama, Y. Kimura, W. Takahashi, and M. Toyoda, On a
strongly nonexpansive sequence in Hilbert spaces, Journal of
Nonlinear and Convex Analysis 8 (2007), 471489.
 K. Aoyama, Y. Kimura, W. Takahashi, and M. Toyoda,
Finding common fixed points of a countable family of
nonexpansive mappings in a Banach space, Scientiae Mathematicae
Japonicae 66 (2007), 8999.
 K. Aoyama, Y. Kimura, W. Takahashi, and M. Toyoda,
Approximation of common fixed points of a countable family
of nonexpansive mappings in a Banach space, Nonlinear Analysis
Series A: Theory, Methods & Applications 67 (2007),
23502360.
 H. Fukharuddin, Y. Kimura, and H. Kiuchi, Noor iterations
with errors for two asymptotically nonexpansive mappings in the
intermediate sense in a Banach space,
Scientiae Mathematicae Japonicae 63 (2006), 5160.
 Y. Kimura, Weak convergence of resolvents of maximal monotone
operators and Mosco convergence, Fixed Point Theory
6 (2005), 5969.
 Y. Kimura, W. Takahashi, and M. Toyoda, Convergence to common
fixed points of a finite family of nonexpansive mappings,
Archiv der Mathematik 84 (2005), 350363.
 Y. Kimura, Mosco convergence of closed convex subsets and
resolvents of maximal monotone operators, Journal of Nonlinear
and Convex Analysis 4 (2003), 269275.
 T. Ibaraki, Y. Kimura, and W. Takahashi, Convergence
theorems for generalized projections and maximal monotone
operators in Banach spaces, Abstract and Applied Analysis
2003 (2003), 621629.
 Y. Kimura and W. Takahashi, Weak convergence to common
fixed points of countable nonexpansive mappings and its
applications, Journal of the Korean Mathematical Society
38 (2001), 12751284.
 Y. Kimura and W. Takahashi, Strong convergence of sunny
nonexpansive retractions in Banach spaces, PanAmerican
Mathematical Journal 9 (1999), 16.
 Y. Kimura, A characterization of epiconvergence for lower
semicontinuous functions without separability,
Mathematica Japonica 49 (1999), 285291.
Articles in Conference Proceedings
 Y. Kimura, The shrinking projection method and resolvents
on Hadamard spaces, Mathematical programming and game theory,
Indian Stat. Inst. Ser., Springer, Singapore, 2018, pp. 131139.
 Y. Kimura and K. Satô, Image recovery problem on a geodesic
space with curvature bound above by one, Proceedings of the
Third Asian Conference on Nonlinear Analysis and Optimization,
(Matsue, Japan, 2012), (S. Akashi, T. Tanaka, and W. Takahashi
eds.), pp. 165172.
 Y. Kimura, Approximation of a fixed point of nonlinear
mappings with nonsummable errors in a Banach space, Proceedings
of the International Symposium on Banach and Function Spaces IV
(Kitakyushu, Japan), (L. Maligranda, M. Kato, and T. Suzuki
eds.), 2012, pp. 303311.
 Y. Kimura, Shrinking projection method for a family of
nonexpansive mappings in a Hadamard space, Proceedings
of the Seventh International Conference on Nonlinear Analysis and
Convex Analysis I (S. Akashi, D. S. Kim, T. H. Kim, G. M. Lee,
W. Takahashi, and T. Tanaka eds.), 2013, pp.229235.
 Y. Kimura, Approximation of a fixed point of nonexpansive
mapping with nonsummable errors in a geodesic space,
Proceedings of the 10th International Conference on Fixed Point
Theory and Its Applications, 2012, 157164.
 K. Aoyama and Y. Kimura, A note on the hybrid steepest
descent methods, Proceedings of the 10th International
Conference on Fixed Point Theory and Its Applications, 2012, pp.7380.
 Y. Kimura, Shrinking projection method for a family of
quasinonexpansive mappings with a sequence of subsets of an index
set, Nonlinear Mathematics for Uncertainty and its Applications
(S. Li, X. Wang, Y. Okazaki, J. Kawabe, T. Murofushi, and L. Guan
eds.), 2011, pp.371378.
 Y. Kimura, Shrinking projection methods and common zero point
problems for a finite family of maximal monotone
operators, Proceedings of the Sixth International
Conference on Nonlinear Analysis and Convex Analysis (Tokyo,
Japan) (S. Akashi, Y. Kimura, and T. Tanaka eds.), 2010,
pp.125133.
 Y. Kimura, Strong convergence theorems by a hybrid method for
families of relatively nonexpansive mappings in Banach
spaces, Proceedings of Asian Conference on Nonlinear
Analysis and Optimization (Shimane, Japan) (S. Akashi,
W. Takahashi, and T. Tanaka eds.), 2009, pp.163172.
 Y. Kimura, Weak convergence of an iterative scheme with a
weaker coefficient condition, Modeling, Computation and
Optimization (S. K. Neogy, A. K. Das, and R. B. Bapat, eds.),
2009, pp.287298.
 Y. Kimura, An improvement of coefficient condition for
weakly convergent iterative schemes, Proceedings of the Fifth
International Conference on Nonlinear Analysis and Convex
Analysis (Hsinchu, Taiwan) (S.B. Hsu, H.C. Lai, L.J. Lin,
W. Takahashi, T. Tanaka, and J.C. Yao eds.), 2008, pp.8593.
 K. Aoyama, Y. Kimura, W. Takahashi, and M. Toyoda, Strongly
nonexpansive sequences and their applications in Banach spaces,
Proceedings of the Eighth International Conference on Fixed
Point Theory and its Applications (Chiang Mai, Thailand),
(S. Dhompongsa, K. Goebel, W. A. Kirk, S. Plubtieng, B. Sims,
and S. Suantai eds.), 2008, pp.118.
 Y. Kimura, Equilibrium problems and convergence of
resolvents for a sequence of functions, Proceedings of the
International Symposium on Banach and Function Spaces II
(Kitakyushu, Japan) (M. Kato and L. Maligranda, eds.), 2008,
pp.349359.
 Y. Kimura, On a strong convergence theorem of resolvents for
maximal monotone operators in a Banach space, Proceedings
of 2005 Symposium on Applied Functional AnalysisInformation
Science and Related Fields (T. Murofushi, W. Takahashi, and
M. Tsukada eds.), 2007, pp.193202.
 Y. Kimura, Approximating zeros of a monotone operator with
iterative algorithms, Proceedings of the Fourth International
Conference on Nonlinear Analysis and Convex Analysis (Okinawa,
Japan) (W. Takahashi and T. Tanaka eds.), 2007, pp.253260.
 Y. Kimura, A characterization of strong convergence for a
sequence of resolvents of maximal monotone operators,
Proceedings of the Seventh International Conference on Fixed Point
Theory and its Applications (Guanajuato, Mexico) (H. Fetter,
B. Gamboa de Buen, K. Goebel, W. A. Kirk, and B. Sims, eds.),
2006, pp.149159.
 Y. Kimura, Mosco convergence and maximal monotone operators in
Banach spaces, Proceedings of the Third International
Conference on Nonlinear Analysis and Convex Analysis (Tokyo, Japan)
(W. Takahashi and T. Tanaka eds.), 2004, pp.195202.
 Y. Kimura, On Mosco convergence for a sequence of closed convex
subsets of Banach spaces, Proceedings of the International
Symposium on Banach and Function Spaces (Kitakyushu, Japan) (M. Kato
and L. Maligranda, eds.), 2004, pp.291300.
Edited book
 S. Akashi, Y. Kimura, and T. Tanaka (eds.), Nonlinear
analysis and convex analysis, Yokohama Publishers,
Yokohama, 2010, In celebration of the retirement of Professor
Wataru Takahashi, ISBN: 9784946552410.
CV
Education
 DSc, Tokyo Institute of Technology (2000).
 MSc, Tokyo Institute of Technology (1995).
 BSc, Tokyo Institute of Technology (1993).
Employment
 Professor, Department of Information Science, Toho University (2015present).
 Associate Professor, Department of Information Science, Toho University (20112015).
 Assistant Professor, Department of Mathematical and Computing Sciences, Tokyo Institute of Technology (20022011).
 Research Associate, Institute of Economic Research, Hitotsubashi University (19992002).
Contact
 Postal Address

Department of Information Science
Toho University
221, Miyama, Funabashi, Chiba 2748510
Japan
 Telephone
 +81 47 472 8722
 Email

yasunori@is.sci.tohou.ac.jp
yasunori@is.sci.tohou.ac.jp