CURRICULUM VITAEEducation:1986-1990 Faculty of Engineering, Yamaguchi University. (Bachelor of Engineering) 1990-1992 Department of Computer Science and Communication Engineering, Kyushu University. (Master of Engineering) 1992-1993 School of Computer Science, McGill University, Montreal. Visiting Student. Funded by Japanese Government. 1992-1995 Department of Computer Science and Communication Engineering, Kyushu University. (Doctor of Engineering)Employment:1995-1995 Research Associate, Kyushu University. 1995-1997 Lecturer, Kyushu Institute of Design. 1997-2014 Associate Professor, Hiroshima University. 2014 Professor, Hiroshima University.Visiting Positions:2001 Apr - 2001 May Universite de Metz, France 2002 Oct - 2003 Sep Universite de Metz, France (Monbusho-Sponsored Japanese Overseas Research Fellow)Grants:1993-1995 The Ministry of Education, Science, Sports and Culture (JSPS Research Fellowships for Young Scientists) No. 1149, JPY 1,800,000 1997-1998 The Ministry of Education, Science, Sports and Culture (Grant-in-Aid for Encouragement of Young Scientists (A)) No. 09780297, JPY 2,000,000 1999-2000 The Ministry of Education, Science, Sports and Culture (Grant-in-Aid for Encouragement of Young Scientists (A)) No. 11780277, JPY 1,800,000 2001 The Telecommunications Advancement Foundation JPY 839,000 2001-2002 The Ministry of Education, Science, Sports and Culture (Grant-in-Aid for Encouragement of Young Scientists (A)) No. 13780241, JPY 1,800,000 2002-2003 Monbusho-Sponsored Japanese Overseas Research Fellow 2004-2006 The Ministry of Education, Science, Sports and Culture (Grant-in-Aid for Young Scientists (B)) No. 16700015, JPY 2,400,000 2007-2010 Japan Society for the Promotion of Science (Grant-in-Aid for Scientific Research (C)) No. 19500014, JPY 2,500,000 2011-2015 Japan Society for the Promotion of Science (Grant-in-Aid for Scientific Research (C)) No. 23500018, JPY 3,900,000 2016-2020 Japan Society for the Promotion of Science (Grant-in-Aid for Scientific Research (C)) No. 16K00020, JPY 3,500,000Awards and Fellowships:1993 Mar Awarded "Telecom-Columbus Award" from the Telecommunications Advancement Foundation 1993-1995 Research Fellow of Japan Society for the Promotion of Science (JSPS) 2008 Jan Awarded "2007 EATCS/LA Best Presentation Award" from the EATCS Japan Chapter and LA Symposium 2009 Dec Awarded "The ISS Distinguished Service Award" from the IEICE Information and Systems Society (ISS) (Contribution as an editor of IEICE Transactions) 2011 Jun Awarded "The ISS Distinguished Reviewer Award" from the IEICE Information and Systems Society (ISS) (Contribution as a reviewer of IEICE Transactions) 2018 Feb Awarded "2017 EATCS/LA Best Presentation Award" from the EATCS Japan Chapter and LA Symposium[1] Chuzo Iwamoto and Masato Haruishi, "Computational Complexity of Usowan Puzzles", IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E101-A, No. 9, pp. 1537-1540 (2018) doi:10.1587/transfun.E101.A.1537 [2] Chuzo Iwamoto and Tatsuaki Ibusuki, "Dosun-Fuwari is NP-complete", Journal of Information Processing, Vol. 26, pp. 358-361 (2018) doi:10.2197/ipsjjip.26.358 [3] Chuzo Iwamoto and Masato Haruishi, "NP-completeness of Mojipittan", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J100-D, No. 12, pp. 974-977 (2017) doi:10.14923/transinfj.2017JDL8016 [4] Chuzo Iwamoto, "Finding the Minimum Number of Open-Edge Guards in an Orthogonal Polygon is NP-hard", IEICE Transactions on Information and Systems, Vol. E100-D, No. 7, pp. 1521-1525 (2017) doi:10.1587/transinf.2016EDL8251 [5] Chuzo Iwamoto and Yuta Matsui, "Computational Complexity of Building Puzzles", IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E99-A, No. 6, pp. 1145-1148 (2016) doi:10.1587/transfun.E99.A.1145 [6] Chuzo Iwamoto and Yusuke Kitagaki, "Visibility Problems for Manhattan Towers", IEICE Transactions on Information and Systems, Vol. E99-D, No. 3, pp. 607-614 (2016) doi:10.1587/transinf.2015FCP0007 [7] Chuzo Iwamoto, "Computational Complexity of Generalized Golf Solitaire", IEICE Transactions on Information and Systems, Vol. E98-D, No. 3, pp. 541-544 (2015) doi:10.1587/transinf.2014FCL0001 [8] Chuzo Iwamoto and Yuta Matsui, "Computational Complexity of Generalized Forty Thieves", IEICE Transactions on Information and Systems, Vol. E98-D, No. 2, pp. 429-432 (2015) doi:10.1587/transinf.2014EDL8154 [9] Chuzo Iwamoto, "Yosenabe is NP-complete", Journal of Information Processing, Vol. 22, No. 1, pp. 40-43 (2014) doi:10.2197/ipsjjip.22.40 [10] Chuzo Iwamoto and Toshihiko Kume, "Computational Complexity of the r-visibility Guard Set Problem for Polyominoes", Lecture Notes in Computer Science, Springer-Verlag, vol. 8845, pp. 87-95 (2014) doi:10.1007/978-3-319-13287-7_8 [11] Chuzo Iwamoto and Yuta Matsui, "Generalized Pyramid is NP-complete", IEICE Transactions on Information and Systems, Vol. E96-D, No. 11, pp. 2462-2465 (2013) doi:10.1587/transinf.E96.D.2462 [12] Chuzo Iwamoto, Yuta Mukai, Yuichi Sumida, and Kenichi Morita, "Generalized Chat Noir is PSPACE-complete", IEICE Transactions on Information and Systems, Vol. E96-D, No. 3, pp. 502-505 (2013) doi:10.1587/transinf.E96.D.1 [13] Chuzo Iwamoto, Kento Sasaki, and Kenichi Morita, "A Polynomial-Time Reduction from the 3SAT Problem to the Generalized String Puzzle Problem", Algorithms, Vol. 5, No. 2, pp. 261-272 (2012) doi:10.3390/a5020261 [14] Chuzo Iwamoto, Yusuke Kitagaki, and Kenichi Morita, "Finding the Minimum Number of Face Guards is NP-Hard", IEICE Transactions on Information and Systems, Vol. E95-D, No. 11, pp. 2716-2719 (2012) doi:10.1587/transinf.E95.D.2716 [15] Chuzo Iwamoto, Junichi Kishi, and Kenichi Morita, "Lower Bound of Face Guards of Polyhedral Terrains", Journal of Information Processing, Vol. 20, No. 2, pp. 435-437 (2012) doi:10.2197/ipsjjip.20.435 [16] Chuzo Iwamoto, Yoshihiro Wada, and Kenichi Morita, "Generalized Shisen-Sho is NP-complete", IEICE Transactions on Information and Systems, Vol. E95-D, No. 11, pp. 2712-2715 (2012) doi:10.1587/transinf.E95.D.2712 [17] Chuzo Iwamoto and Takumi Kuranobu, "Improved Lower and Upper Bounds of Face Guards of Polyhedral Terrains", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J95-D, No. 10, pp. 1869-1872 (2012) [18] Chuzo Iwamoto, Yusuke Ono, Kenichi Morita, and Katsunobu Imai, "Relationship between Depth and Nondeterministic Gates in Nondeterministic Circuit Families", IPSJ Journal, Vol. 52, No. 4, pp. 1667-1677 (2011) (in Japanese) [19] Chuzo Iwamoto, Kento Sasaki, Kenji Nishio, and Kenichi Morita, "NP-hard and k-EXPSPACE-hard Cast Puzzles", IEICE Transactions on Information and Systems, Vol. E93-D, No. 11, pp. 2995-3004, November 2010, doi:10.1587/transinf.E93.D.2995 [20] Chuzo Iwamoto, Daisuke Tachibana, Seiki Tokunaga, and Kenichi Morita, "A Tight Space-Hierarchy Theorem for Nondeterministic Turing Machines", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J93-D, No. 9, pp. 1717-1726, September 2010 [21] Chuzo Iwamoto and Reijiro Mikamo, "An Efficient Reconstruction Algorithm for Restricted Domino Tilings", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J92-D, No. 6, June 2009, pp. 758-766 [22] Naonori Tanimoto, Katsunobu Imai, Chuzo Iwamoto, and Kenichi Morita, "On the Non-existance of Rotation-Symmetric von Neumann Neighbor Number-Conserving Cellular Automata of Which the State Number is Less than Four", IEICE Transactions on Information and Systems, Vol. E92-D, No. 2 (2009) pp. 255-257, doi:10.1587/transinf.E92.D.255 [23] Chuzo Iwamoto, Harumasa Yoneda, Kenichi Morita, and Katsunobu Imai, "A Technique on Nondeterministic Cellular Automata", IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E91-A, No. 9 (2008) pp. 2335-2340, doi:10.1093/ietfec/e91-a.9.2335 [24] Chuzo Iwamoto, "Special Section on Foundations of Computer Science", IEICE Transactions on Information and Systems, Vol. E91-D, No. 2 (2008) pp. 161, doi:10.1093/ietisy/e91-d.2.161 [25] Chuzo Iwamoto, Naoki Hatayama, Yoshiaki Nakashiba, Kenichi Morita, and Katsunobu Imai, "Translational Lemmas for DLOGTIME-uniform Circuits, Alternating TMs, and PRAMs", Acta Informatica, Vol. 44, No. 5 (2007) pp. 345-359, doi:10.1007/s00236-007-0051-2 [26] Katsunobu Imai, Chuzo Iwamoto, and Kenichi Morita, "A Five-State von Neumann Neighbor Universal Hyperbolic Cellular Automaton", Journal of Cellular Automata, Vol. 1, No. 4 (2007) pp. 275-297 [27] Chuzo Iwamoto and Maurice Margenstern, "Time and Space Complexity Classes of Hyperbolic Cellular Automata", IEICE Transactions on Information and Systems, Vol. E87-D, No. 3 (2004) pp. 700-707 [28] Chuzo Iwamoto, Tomoka Yokouchi, Kenichi Morita, and Katsunobu Imai, "Prefix Computations on Iterative Arrays with Sequential Input/Output Mode", IEICE Transactions on Information and Systems, Vol. E87-D, No. 3 (2004) pp. 708-712 [29] Toshiyuki Fujiwara, Kazuo Iwama, and Chuzo Iwamoto, "Partially Effective Randomization in Simulations Between ARBITRARY and COMMON PRAMs", Journal of Parallel and Distributed Computing, Vol. 64, No. 3 (2004) pp. 319-326, doi:10.1016/j.jpdc.2003.12.001 [30] Katsunobu Imai, Akihiko Ikazaki, Chuzo Iwamoto, and Kenichi Morita, "A Logically Universal Number-Conserving Cellular Automaton with a Unary Table-Lookup Function", IEICE Transactions on Information and Systems, Vol. E87-D, No. 3 (2004) pp. 694-699 [31] Chuzo Iwamoto, Katsuyuki Tateishi, Kenichi Morita, and Katsunobu Imai, "Simulations Between Multi-dimensional Deterministic and Alternating Cellular Automata", Fundamenta Informaticae, Vol. 58, No. 3-4 (2003) pp. 261-271 [32] Chuzo Iwamoto, Katsuyuki Tateishi, Kenichi Morita, and Katsunobu Imai, "A Quadratic Speed-up Theorem for Iterative Arrays", Acta Informatica, Vol. 38, No. 11/12 (2002) pp. 847-858, doi:10.1007/s002360200092 [33] Chuzo Iwamoto, Tomonobu Hatsuyama, Kenichi Morita, and Katsunobu Imai, "Constructible Functions in Cellular Automata and their Applications to Hierarchy Results", Theoretical Computer Science, Vol. 270, No. 1-2 (2002) pp. 797-809, doi:10.1016/S0304-3975(01)00112-8 [34] Katsunobu Imai, Yukio Matsuda, Chuzo Iwamoto, and Kenichi Morita, "A Three-Dimensional Uniquely Parsable Array Grammar that Generates and Parses Cubes", Electronic Notes in Theoretical Computer Science, Vol. 46 (2001), 16 pages, doi:10.1016/S1571-0661(04)80996-4 [35] Hiroshi Hosokawa, Kenichi Morita, Chuzo Iwamoto, and Katsunobu Imai, "Universality of the Language Generating Ability of Two-Point Splicing Systems", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J83-D-I, No. 1 (2000) pp. 55-59 [36] Masatami Iwamoto and Chuzo Iwamoto, "Application of Finite Difference Method to Arbitrary Mesh Points", The Transactions of the Institute of Electrical Engineers of Japan, Vol. 120-A, No. 2, pp. 116-121, 2000 (in Japanese) [37] Chuzo Iwamoto and Kazuo Iwama, "Space Hierarchies of Turing Machines with Restricted Tape Symbols", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J82-D-I, No. 6 (1999) pp. 661-668 [38] Masatami Iwamoto and Chuzo Iwamoto, "Technological Changes and the Effect of Business Cycles in Electric Manufacturing Companies for the Postwar 50 Years", The Transactions of the Institute of Electrical Engineers of Japan, Vol. 119-A, No. 6 (1999) pp. 725-730 (in Japanese) [39] Kazuo Iwama and Chuzo Iwamoto, "A Canonical Form of Vector Machines", Information and Computation, Vol. 141, No. 1 (1998) pp. 37-65, doi:10.1006/inco.1997.2685 [40] Kazuo Iwama, Chuzo Iwamoto, and Taku Ohsawa, "A Faster Parallel Algorithm for k-Connectivity", Information Processing Letters, Vol. 61, No. 5 (1997) pp. 265-269, doi:10.1016/S0020-0190(97)00015-X [41] Chuzo Iwamoto and Kazuo Iwama, "Time Complexity Hierarchies of Extended TMs for Parallel Computation", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J80-D-I, No. 5 (1997) pp. 421-427 [42] Kazuo Iwama and Chuzo Iwamoto, "$\alpha$-Connectivity: A Gradually Nonparallel Graph Problem", Journal of Algorithms, Vol. 20, No. 3 (1996) pp. 526-544, doi:10.1016/S0196-6774(96)90033-5 [43] Kazuo Iwama, Chuzo Iwamoto, and Monzur Morshed, "Time Lower Bounds Do Not Exist for CRCW PRAMs", Theoretical Computer Science, Vol. 155, No. 2 (1996) pp. 411-424, doi:10.1016/0304-3975(94)00299-1 [44] Chuzo Iwamoto and Godfried T. Toussaint, "Finding Hamiltonian Circuits in Arrangements of Jordan Curves is NP-Complete", Information Processing Letters, Vol. 52, No. 4 (1994) pp. 183-189, doi:10.1016/0020-0190(94)90125-2 [45] Chuzo Iwamoto, K.Iwama, "RS-Vector Algorithms for Combinatorial Problems", Systems and Computers in Japan, Vol. 24, No. 7 (1993) pp. 41-51, doi:10.1002/scj.4690240704 [46] Chuzo Iwamoto and Kazuo Iwama, "RS-Vector Algorithms for Combinatorial Problems", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J75-D-I, No. 3, (1992) pp. 143-151 [47] Chuzo Iwamoto, Katsushi Inoue, and Itsuo Takanami, "Some Properties of Homogeneous Pyramid automata", IEICE Transactions on Information and Systems (Japanese Edition), Vol. J73-D-I, No. 9 (1990) pp. 778-780Refereed Journal Papers:[48] Chuzo Iwamoto and Tatsuaki Ibusuki, "Kurotto and Juosan are NP-complete", The 21st Japan Conference on Discrete and Computational Geometry, Graphs, and Games (JCDCG^3 2018), Ateneo de Manila University, Philippines, pp. 46-48, September 1-3, 2018 [49] Chuzo Iwamoto, Masato Haruishi, and Tatsuaki Ibusuki, "Herugolf and Makaro are NP-complete", The Ninth International Conference on Fun with Algorithms (FUN 2018), Vol. 100, No. 23, La Maddalena, Maddalena Islands, Italy, June 13-15, 2018, pp.23:1-23:11, doi:10.4230/LIPIcs.FUN.2018.23 [50] Kota Sato, Katsunobu Imai, and Chuzo Iwamoto, "Universal von Neumann Neighborhood Cellular Automata on Penrose Tilings", The 1st International Workshop on Applications and Fundamentals of Cellular Automata (AFCA'13), Matsuyama, Japan, pp. 515-521, December 4-6, 2013, doi:10.1109/CANDAR.2013.92 [51] Chuzo Iwamoto and Toshihiko Kume, "Locating the Minimum Number of Guards with r-visibility in a Polyomino is NP-hard", The 16th Japan Conference on Discrete and Computational Geometry and Graphs (JCDCGG 2013), Tokyo, Japan, pp. 100-101, September 17-19, 2013 [52] Chuzo Iwamoto, Kento Sasaki, and Kenichi Morita, "Computational Complexity of String Puzzles", Proceedings of the 18th Computing: the Australasian Theory Symposium (CATS 2012), Melbourne, Australia, CRPIT, 128, Mestre, J. Eds., ACS., pp. 69-74, 2012 [53] Katsunobu Imai, Yasuaki Masamori, Chuzo Iwamoto, and Kenichi Morita, "On Designing Gliders in Three-Dimensional Larger than Life Cellular Automata", in F. Peper et al. (eds.): Natural Computing (Proceedings in Information and Communications Technology), Himeji, Japan, Vol. 2, Part 3, Springer 2010, pp. 184-190 (September 23-25, 2009) doi:10.1007/978-4-431-53868-4_21 [54] Chuzo Iwamoto, Kento Sasaki, Kenji Nishio, and Kenichi Morita, "Computational Complexity of Cast Puzzles", Proceedings of the 20th International Symposium on Algorithms and Computation (ISAAC 2009) (Lecture Notes in Computer Science, vol. 5878), Hawaii, USA, 2009, pp. 122-131, doi:10.1007/978-3-642-10631-6_14 [55] Mitsuru Matsushima, Katsunobu Imai, Chuzo Iwamoto, and Kenichi Morita, "A Java Based Three-Dimensional Cellular Automata Simulator and its Application to Three-Dimensional Larger Than Life", Proceedings of Automata 2008: Theory and Applications of Cellular Automata, Bristol, UK, pp. 413-416, Luniver Press, Frome, UK 2008 (June 12-14, 2008), ISBN 978-1-905986-16-3 [56] Chuzo Iwamoto, Harumasa Yoneda, Kenichi Morita, and Katsunobu Imai, "A Time Hierarchy Theorem for Nondeterministic Cellular Automata", Proceedings of the Fourth Annual Conference on Theory and Applications of Models of Computation (Lecture Notes in Computer Science, vol. 4484), Shanghai, China, May 22-25 2007, pp. 511-520, doi:10.1007/978-3-540-72504-6_46 [57] Chuzo Iwamoto, Yoshiaki Nakashiba, Kenichi Morita, and Katsunobu Imai, "Translational Lemmas for Alternating TMs and PRAMs", Proceedings of the 15th International Symposium on Fundamentals of Computation Theory (Lecture Notes in Computer Science, vol. 3623), Luebeck, Germany, August 17-20 2005, pp. 126-137, doi:10.1007/11537311_13 [58] Chuzo Iwamoto, Naoki Hatayama, Kenichi Morita, Katsunobu Imai, and Daisuke Wakamatsu, "Hierarchies of DLOGTIME-Uniform Circuits", in Maurice Margenstern (ed.): Machines, Computations and Universality (Proceedings of MCU2004, Saint-Petersburg, Russia, September 21-26, 2004), Lecture Notes in Computer Science, vol. 3354, Springer 2005, pp. 211-222, doi:10.1007/978-3-540-31834-7_17 [59] Katsunobu Imai, Yousuke Kasai, Yuya Sonoyama, Chuzo Iwamoto, and Kenichi Morita, "Self-reproduction and Shape Formation in Two and Three Dimensional Cellular Automata with Conservative Constraints", Proceedings of the Eighth International Symposium on Artificial Life and Robotics (AROB2003), Beppu, Japan, January 24-26, 2003, pp. 377-380 [60] Chuzo Iwamoto, Takeshi Andou, Kenichi Morita, and Katsunobu Imai, "Computational Complexity in the Hyperbolic Plane", Proceedings of the 27th International Symposium on Mathematical Foundations of Computer Science, MFCS2002, (Lecture Notes in Computer Science, vol. 2420), Warszawa, Poland, August 26-30, 2002, pp. 365-374 [61] Katsunobu Imai, Kenji Fujita, Chuzo Iwamoto, and Kenichi Morita, "Embedding a Logically Universal Model and a Self-Reproducing Model into Number-Conserving Cellular Automata", Proceedings of the Third International Conference on Unconventional Models of Computation (UMC2002) (Lecture Notes in Computer Science, vol. 2509) Himeji, Japan, October 15-19, 2002, pp. 164-175 [62] Chuzo Iwamoto, Katsuyuki Tateishi, Kenichi Morita, and Katsunobu Imai, "Speeding-up Cellular Automata by Alternations", Proceedings of the third International Conference on Machines, Computations and Universality, MCU2001, (Lecture Notes in Computer Science, vol. 2055), Chisinau, Moldova, May 23-28, 2001, pp. 240-251 [63] Chuzo Iwamoto, Tomonobu Hatsuyama, Kenichi Morita, and Katsunobu Imai, "On Time-Constructible Functions in One-Dimensional Cellular Automata", Proceedings of the Twelveth International Symposium on Fundamentals of Computation Theory (Lecture Notes in Computer Science, vol. 1684), Iasi, Romania, 1999, pp. 316-326 [64] Masatami Iwamoto, Chuzo Iwamoto, and Tadatoshi Yamada, "Juglar Cycles and Their Effects on Technological Changes", Portland International Conference on Management of Engineering and Technology (PICMET99), Proceedings Vol-1: Book of Summaries, page 287, Proceedings Vol-2: Papers Presented at PICMET99, 17-34.PDF, Portland, USA, 1999 [65] Masatami Iwamoto and Chuzo Iwamoto, "Periodic Recession and R&D Management in Japan", Proceedings of the 1998 IEEE EMS International Engineering Management Conference (IEMC'98, rescheduled for May 3-5, 1999), San Juan, Puerto Rico, 1999, pp. 198-201 [66] Kazuo Iwama and Chuzo Iwamoto, "Improved Time and Space Hierarchies of One-Tape Off-Line TMs", Proceedings of the 23rd International Symposium on Mathematical Foundations of Computer Science (Lecture Notes in Computer Science, vol. 1450), Brno, Czech Republic, 1998, pp. 580-588, doi:10.1007/BFb0055808 [67] Chuzo Iwamoto, "Complexity Hierarchies on DLOGTIME-Uniform Circuits and TMs with Restricted Symbols", Proceedings of the Eleventh Workshop on Circuits and Systems in Karuizawa, pp. 367-372, 1998 (invited) [68] Kazuo Iwama and Chuzo Iwamoto, "(1+o(1))S(n)-Space Is Stronger Than S(n)-Space", Proceedings of the Third Japan-Korea Joint Workshop on Algorithms and Computation, Fukuoka, Japan, 1997, pp. 72-79 [69] Kazuo Iwama and Chuzo Iwamoto, "Parallel Complexity Hierarchies Based on PRAMs and DLOGTIME-Uniform Circuits" Proceedings of the Eleventh Annual IEEE Conference on Computational Complexity, Philadelphia, USA, 1996, pp. 24-32, doi:10.1109/CCC.1996.507665 [70] Chuzo Iwamoto and Kazuo Iwama, "How Can We Demonstrate Increasing Parallel Complexities?", ACM/UMIACS Fourth Workshop on Parallel Algorithms, Philadelphia, USA, 1996 [71] Chuzo Iwamoto, "On Problems with Gradually Increasing Parallel Complexities", Proceedings of the 1996 IEICE General Conference, The Frontline of Theoretical Computer Science, pp. 361-362, 1996 [72] Kazuo Iwama, Chuzo Iwamoto, and Taku Ohsawa, "A Faster Parallel Algorithm for k-Connectivity", Proceedings of the Second KOREA-JAPAN Joint Workshop on Algorithms and Computation, KAIST, Taejon, Korea, August 1996, pp. 8-13 [73] Chuzo Iwamoto and Kazuo Iwama, "Extended Graph Connectivity and Its Gradually Increasing Parallel Complexity", Proceedings of the Fifth Annual International Symposium on Algorithms and Computation (Lecture Notes in Computer Science, vol. 834), Beijing, China, 1994, pp. 478-486, doi:10.1007/3-540-58325-4_214 [74] Chuzo Iwamoto and Godfried T. Toussaint, "Finding Hamiltonian Circuits in Arrangements of Jordan Curves is NP-Complete", Proceedings of the Sixth Canadian Conference on Computational Geometry, Saskatoon, Canada, August 1994, pp. 93-98 [75] Chuzo Iwamoto and Kazuo Iwama, "Parallelizabilities of Vertex Set Partition Problems", Proceedings of the Joint Symposium on Parallel Processing, Yokohama, Japan, 1992, pp. 47-53Refereed International Conference Papers:Non-Refereed Publications: