"Atsufumi Honda,Kosuke Naokawa,Kentaro Saji,Masaaki Umehara,Kotaro Yamada","On the existence of four or more curved foldings with common creases and crease patterns",,"Beitr?ge zur Algebra und Geometrie / Contributions to Algebra and Geometry",,,,,2021,Oct.
"Masaaki Umehara,Kotaro Yamada","Hypersurfaces with light-like points in a Lorentzian manifold II",,"Kodai Math. J.",,"Vol. 44","No. 1",,2021,Mar.
"Atsufumi Honda,Naokawa Kosuke,Kotaro Yamada,Masaaki Umehara","Isometric deformations of wave fronts at non-degenerate singular points",,"HIROSHIMA MATH. J.",,"Vol. 50","No. 3","Page 269--312",2020,Nov.
"Atsufumi Honda,Naokawa Kosuke,Masaaki Umehara,Kotaro Yamada","Curved foldings with common creases and crease patterns",,"Adv. Appl. Math.",,"Vol. 121",,"Page 25",2020,Oct.
"Atsufumi Honda,Naokawa Kosuke,Masaaki Umehara,Kotaro Yamada","Duality on generalized cuspidal edges preserving singular set images and first fundamental forms",,"J. of Singul.",,"Vol. 22",,"pp. 59--91",2020,Aug.
"Atsufumi Honda,Naokawa Kosuke,Masaaki Umehara,Kotaro Yamada","Cuspidal edges with the same first fundamental forms along a  knot",,"：J.  Knot Theory Ramifications",,"Vol. 29","No. 7",,2020,June
"Akamine Shintaro,Masaaki Umehara,Kotaro Yamada","Improvement of the Bernstein-type theorem for space-like zero mean curvature graphs in Lorentz-Minkowski space using fluid mechanical duality",,"Proc. Amer. Math. Soc. Ser. B",,"Vol. 7",,"pp. 17-27",2020,Feb.
"S. Akamine,A. Honda,M. Umehara,K.Yamada","Bernstein-type theorem for zero mean curvature hypersurfaces without time-like points in Lorentz-Minkowski space",,"Bulletin of the Brazilian Mathematical Society, New Series",,,,"  https://doi.org/10.1007/s00574-020-00196-8",2020,Jan.
"M. Umehara,K. Yamada","Hypersurfaces with light-like points in a Lorentzian manifold",,"Journal of Geometric Analysis",,"Vol. 29",,"pp. 3405-3437",2019,Dec.
"S. Akamine,M. Umehara,K.Yamada","Space-like maximal surfaces containing entire null lines in Lorentz-Minkowski 3-space",,"Proc. Japan Acad. Ser.A, Math. Sci.",,"Vol. 95","No. 9","pp. 97-102",2019,Oct.
"Atsufumi Honda,Naokawa Kosuke,Masaaki Umehara,Kotaro Yamada","Isometric realization of cross caps as formal power series and its applications",,"Hokkaido Mathematical Journal",,"Vol. 48","No. 1","pp. 1-44",2019,Feb.
"Shoichi Fujimori,Yu Kawakami,Masatoshi Kokubu,Wayne Rossman,Masaaki Umehara,Kotaro Yamada","Exceptional constant mean curvature one  catenoids in de Sitter 3-space",,,,,,,2019,Jan.
"Masaaki Umehara,Kotaro Yamada","Surfaces with light-like points in Lorentz-Minkowski 3-space with applications","International Meeting on Lorentzian Geometry GELOMA 2016","Springer Proceedings in Mathematics & Statisticsbook series (PROMS, volume 211)","Springer International Publishing","Vol. 211",,"pp. 253--273",2018,Mar.
"Masaaki Umehara,Kotaro Yamada,Kentaro Saji","特異点をもつ曲線と曲面の幾何学",,"特異点をもつ曲線と曲面の微分幾何学","丸善出版",,,,2017,Dec.
"Shoichi Fujimori,Udo Hertrich-Jeromin,Masatoshi Kokubu,Masaaki Umehara,Kotaro Yamada","Quadrics and Scherk towers",,"Monatshefte f?r Mathematik","Springer-Verlag",,,,2017,July
"Atsufumi Honda,Miyuki Koiso,Masatoshi Kokubu,Masaaki Umehara,Kotaro Yamada","Mixed type surfaces with bounded mean curvature in 3-dimensional space-times",,"Differential Geometry and its Applications",,"Vol. 52",,"pp. 64-77",2017,June
"Masaaki Umehara,Kotaro Yamada","Differential Geometry of Curves and Surfaces",,"Differential Geometry of Curves and Surfaces","World Scientific",,,,2017,May
"Shoichi Fujimori,Yu Kawakami,Masatoshi Kokubu,Wayne Rossman,Masaaki Umehara,Kotaro Yamada","Zero mean curvatrue entire graphs of mixed type in Lorentz-Minkowski 3-space",,"The Quarterly Journal of Mathematics",,"Volume 67","No. 4","pp. 801-837",2016,Dec.
"Kosuke Naokawa,Masaaki Umehara,Kotaro Yamada","Isometric deformations of cuspidal edges",,"Tohoku Math. J.",,"Vol. 68","No. 1","pp. 73-90",2016,Mar.
"Kotaro Yamada","Analytic Extensions of spacelike maximal surfaces in MInkowski 3-space to timelike surfaces","Singuilarities in Generic Geometry and applications",,,,,,2016,
"Martins, L.F.,Saji, K.,Umehara, M.,Kotaro Yamada","Behavior of gaussian curvature and mean curvature near non-degenerate singular points on wave fronts",,"Springer Proceedings in Mathematics and Statistics",,"Vol. 154",,"pp. 247-281",2016,
"Kotaro Yamada","Analytic Extensions of spacelike maximal surfaces in MInkowski 3-space to timelike surfaces","Geometric Analysis in Geometry and Topology 2015 (GAGT 2015)",,,,,,2016,
"Udo Hertrich-Jeromin,Yshihiko Suyama,Masaaki Umehara,Kotaro Yamada","A duality for conformally flat hypersurfaces",,"Beitraege zur Algebra und Geometrie / Contributions to Algebra and Geometry",,"Vol. 56","No. 2","  655-676",2015,Oct.
"Masaaki Umehara,Kotaro Yamada","曲線と曲面・微分幾何的アプローチ（改訂版）",,,"裳華房",,,,2015,Feb.
"Shoichi Fujimori,Young Wook  Kim,Sung-Eun  Koh,Wayne Rossman,Heayong  Shin,Masaaki Umehara,Kotaro Yamada,Seong-Deog Yang","Zero mean curvature surfaces in Lorentz-Minkowski 3-space which change type across a light-like line",,"OSAKA JOURNAL OF MATHEMATICS",,"Vol. 57","No. 1","pp. 285-297",2015,Jan.
"Shoichi Fujimori,Young Wook  Kim,Sung-Eun  Koh,Wayne Rossman,Heayong  Shin,Masaaki Umehara,Kotaro Yamada,Seong-Deog Yang","Zero mean curvature surfaces in Lorentz-Minkowski 3-space and 2-dimensional fuluid mechanics",,"Math. J. Okayama Univ.",,"Vol. 57","No. 1","pp. 173-200",2015,Jan.
"Hasegawa, M.,Honda, A.,Naokawa, K.,Saji, K.,Umehara, M.,Kotaro Yamada","Intrinsic properties of surfaces with singularities",,"International Journal of Mathematics",,"Vol. 26","No. 4",,2015,
"Hasegawa Masaru,Honda Atsufumi,Kosuke Naokawa,Masaaki Umehara,Kotaro Yamada","Intrinsic invariants of Cross Caps",,"Selecta Math. New Ser.",,"Vol. 20",,"pp. 769--785",2014,July
"Leoner Ferrer,Francisco Martin,Masaaki Umehara,Kotaro Yamada","A construction of a complete bounded null curves in C^3",,"Kodai Mathematical Journal",,"Vol. 37","No. 1","pp. 59--96",2014,Mar.
"Francisco Martin,Masaaki Umehara,Kotaro Yamada","Flat surfaces in hyperbolic 3-space whose hyperbolic Gauss maps are bounded",,"Revista Matem?tica Iberoamericana",,"Vol. 30","No. 1","pp. 309--316",2014,Mar.
"Shoichi Fujimori,Wayne Rossman,Masaaki Umehara,Kotaro Yamada,Seong-Deog Yang","Embedded triply periodic zero mean curvature surfaces",,"Michigan Math. J.",,"Vol. 63","No. 1","pp. 189--207",2014,Mar.
"Fujimori, S.,Kawakami, Y.,Kokubu, M.,Rossman, W.,Umehara, M.,Kotaro Yamada","Hyperbolic metrics on Riemann surfaces and space-like CMC-1 surfaces in de Sitter 3-space",,"Springer Proceedings in Mathematics and Statistics",,"Vol. 26",,"pp. 1-47",2013,
"Shoichi Fujimori,S.E. Koh,Y.W. Kim,Wayne Rossman,H. Shin,Hedenobu Takahashi,Masaaki Umehara,Kotaro Yamada,Seong-Deog Yang","Zero mean curvature surface in L^3 containing a light-like line",,"C. R. Acad. Sxi. Paris, Ser. I",,"Vol. 350",,"Page 975--978",2012,Nov.
"Kentaro Saji,Masaaki Umehara,Kotaro Yamada","Coherent tangent bundles and Gauss-Bonnet formulas for wave fronts",,"Journal of Geometric Analysis",,"Vol. 22",,"pp. 883--409",2012,Apr.
"Shoichi Fujimori,Yu Kawakami,Masatoshi Kokubu,Wayne Rossman,M. Umehara,Kotaro Yamada","CMC-1 trinoids in H3 and metrics of constant curvature one with conical singularities on S^2",,"Prooc. Japan Academy Ser. A",,"Vol. 87",,"pp. 144--149",2011,June
"Kentaro Saji,Masaaki Umehara,Kotaro Yamada","A_2-singularities of hypersurfaces with non-negative sectional curvature in Euclidean space",,"Kodai Math. J.",,"Vol. 34",,"pp. 390--409",2011,June
"Masaaki Umehara,Kotaro Yamada","Applications of a completeness lemma in minimal surface theory to various classes of surfaces",,"Bull. Lond. Math. Soc.",,"Volume 43","No. 1","Page 191-199",2011,May
"Liu, H.,Umehara, M.,Kotaro Yamada","The duality of conformally flat manifolds",,"Bulletin of the Brazilian Mathematical Society",,"Vol. 42","No. 1","pp. 131-152",2011,
"Kotaro Yamada","Minkowski空間の極大曲面とde Sitter空間のCMC-1曲面 (調和写像論の深化と展望)",,"数理解析研究所講究録","京都大学","Vol. 1720",,"pp. 174-181",2010,Nov.
"Kotaro Yamada","数学基礎教育受講者の現状(<特集テーマ>授業・教育の連節)",,"大学教育","九州大学","Vol. 15",,"pp. 11-17",2010,Sept.
"Kentaro Saji,Masaaki  Umehara,Kotaro Yamada","Singularities of Blaschke normal maps of convex surfaces",,"C. R. Math. Acad. Sci. Paris",,"Vol. 348","No. 11-12","Page 665-668",2010,June
"Kentaro Saji,Masaaki Umehara,Kotaro Yamada","The duality between singular points and inflection points on wave fronts",,"Osaka J. Math.",,"Vol. 47","No. 2","Page 591-607",2010,Apr.
"Shoichi Fujimoro,Wayne Rossman,Masaaki Umehara,Kotaro Yamada,Seong-Deog Yang","New maximal surfaces in Minkowski 3-space with arbitrary genus and their cousins in de Sitter 3-space",,"Results Math.",,"Vol. 56","No. 4","Page 41-82",2009,Dec.
"Kentaro Saji,Masaaki Umehara,Kotaro Yamada","Ak singularities of wave fronts",,"Math. Proc. Cambridge Philos. Soc.",,"Vol. 146","No. 3","Page 731-746",2009,Sept.
"Masatoshi Kokubu,Wayne Rossman,Masaaki Umehara,Kotaro Yamada","Asymptotic behavior of flat surfaces in hyperbolic 3-space",,"J. Math. Soc. Japan",,"Vol. 61","No. 3","Page 799-852",2009,Sept.
"Shoichi Fujimori,Wayne Rossman,Masaaki Umehara,Kotaro Yamada,Seong-Deog Yang","Spacelike mean curvature one surfaces in de Sitter 3-space",,"Comm. Anal. Geom.",,"Vol. 17","No. 3","Page 383-427",2009,Sept.
"Francisco Martin,Masaaki Umehara,Kotaro Yamada","Complete bounded holomorphic curves immersed in C^2 with arbitrary genus",,"Proc. Amer. Math. Soc.",,"Vol. 137","No. 10","Page 3437-3450",2009,June
"Kentaro Saji,Masaaki Umehara,Kotaro Yamada","The geometry of fronts",,"Ann. of Math.",,"Vol. 169","No. 2","Page 491-529",2009,Apr.
"Francisco Martin,Masaaki Umehara,Kotaro Yamada","Complete bounded null curves immersed in C^3 and SL(2,C)",,"Calc. Var. Partial Differential Equations",,"Vol. 36","No. 1",,2009,Feb.
"Masaaki Umehara,Kotaro Yamada","曲線と曲面",,"曲線と曲面-微分幾何的アプローチ-","裳華房",,,,2002,June