Special Issues | Category | Title | Authors | No. | Page |
Foreword | In Commemoration of the 50th Anniversary of JAST | Motohiro Kaneta | 1 | 1 | |
Prologue to the Special Issue on "Commemoration of the 50th Anniversary of JAST" | 49th and 50th Editorial Committees of JAST | 1 | 2 | ||
Congratulatory Address | Congratulatory Address | Minister of MEXT Kenji Kosaka | 1 | 3 | |
Enhance Coordination for the Progress of Engineering Technologies | Hiroya Taguchi | 1 | 4 | ||
Expansion of Chemistry | Shinji Murai | 1 | 4 | ||
Congratulations on the 50th Anniversary of the Japanese Society of Tribologists | Masanori Murakami | 1 | 5 | ||
In the Commemoration of the 50th Anniversary | Keiichiro Okabe | 1 | 5 | ||
In Celebration of the 50th Anniversary of Japanese Society of Tribologists | Miki Wadati | 1 | 6 | ||
Contribution of Tribology for Electronics | Tadao Saito | 1 | 6 | ||
Congratulatory Address at the Commemoration Ceremony of the 50th Anniversary of JAST | JAST and the Tribology Division of ASME International: Making Headlines for Tribology | R. S. Cowan | 1 | 7 | |
JAST and STLE: Allies, Innovators and Leaders in the Global Tribology Community | W. E. Wambach | 1 | 10 | ||
Essay | At the 50th Anniversary of JAST | Mitsuru Toyoguchi | 1 | 13 | |
Looking Back over the Down of Lubricants Study | Minoru Kashima | 1 | 14 | ||
The Importance of Multiformity of the Values | Yoshitsugu Kimura | 1 | 15 | ||
Wishing for the Future Development of the JAST | Yoshihiro Suita | 1 | 16 | ||
New Directions of JAST | Masato Tanaka | 1 | 17 | ||
Record | Commemorative Events for the 50th Anniversary | Shinya Sasaki | 1 | 18 | |
On the Notable Strides of the Society for Half a Century | Yuji Shitara, Koji Miyake, Yuki Sato and Akihito Suzuki | 1 | 23 | ||
Outlook | The Society Tomorrow | Joichi Sugimura | 1 | 56 | |
Tribology @|Future Direction as a Technology| |
Ken'ichi Hiratsuka | 1 | 58 | ||
Future Prospects of Tribologists @|Mission of Tribologists| |
Koshi Adachi | 1 | 63 | ||
Essay | Masashi Arita, Yuji Enomoto, Koji Kato, Akio Kono, Yuki Sato, Yorikazu Shimotsuma, Tomoko Hirayama, Minoru Fujita, Muneo Mizumoto, Shigeyuki Mori, Masahiro Yanagisawa, Toshiaki Wakabayashi | 1 | 68 |
Special Issues | Category | Title | Authors | No. | Page |
Prologue to the Special Issue on ''The Life and Achievements of Frank Philip BOWDEN" | Akihito Suzuki | 2 | 85 | ||
Explanations | Dr. F.P.BOWDEN and Tribology | Masahisa Matsunaga | 2 | 86 | |
Prof. F.P.BOWDEN in His Later Years | Masaya Imai | 2 | 92 | ||
The Life of Prof. F.P.BOWDEN | Tadashi Sasada | 2 | 98 | ||
Stick-Slip Phenomena and Adhesion Theory | Takashi Nakano | 2 | 105 | ||
Boundary Lubrication in Vacuum and Adsorbed Layers | Shigeyuki Mori | 2 | 110 | ||
Frictional Temperature | Susumu Norose | 2 | 116 | ||
Lecture | Energy Dispersive X-Ray Spectroscopy iEDSj | Tetsuo Oikawa | 2 | 122 | |
Up-to-date News | Report on World Tribology Congress III | Takanori Obara | 2 | 127 | |
Original Contributions | Conditional Expression for the Occurrence of Stick-Slip Motion Based on the Coulomb Friction Model (Part1)-Formulation and Approximation of Conditional Expression- | Ken Nakano and Yasuhito Kikuchi | 2 | 131 | |
Conditional Expression for the Occurrence of Stick-Slip Motion Based on the Coulomb Friction Model (Part2)-Examination of Conditional Expression and Proposal of Simplified Expression- | Ken Nakano and Yasuhito Kikuchi | 2 | 140 | ||
The Influence of the Sliding Geometry on the Wear of Polyacetal|Selective Transfer Effect of Wear Debris| | Masahiro Kada and Masaru Ishikawa | 2 | 147 | ||
High Temperature Wear and Friction Properties of Particle Dispersed Ni-Cr Composite Material | Kouki Ozaki, Yoshinori Takeichi, Koichi Yamamoto, Tadashi Tanaka and Masao Uemura | 2 | 155 | ||
The Influence of Cage on the NRRO of Rotational Frequency of the Cage in a Ball Bearing | Shoji Noguchi, Yuuki Uehara, Ken Naruo and Tohru Kanada | 2 | 166 | ||
Measurement of Adhesion between Sharp Diamond Indenters and Metals under Engineering Conditions | Yasushi Kojima, Masayuki Shima, Tomohiro Motoda, Tatsuhiro Jibiki and Shinya Sasaki | 2 | 172 | ||
Improving Adhesion of Diamond-Like Carbon Film Using Laser-Induced Surface Periodic Structures | Hiroshi Sawada, Kosuke Kawahara, Takafumi Ninomiya, Atsunobu Mori and Tadahiko Kuroda | 2 | 180 |
Special Issues | Category | Title | Authors | No. | Page |
Commemorative Tribute to Dr. Mitsuru TOYOGUCHI | To The Memory of Dr. Mitsuru TOYOGUCHI | 3 | 189 | ||
To The Memory of Dr. Mitsuru TOYOGUCHI | 3 | 190 | |||
Brief Biography | 3 | 191 | |||
Messages to Tribologists | Serial | From Lubrication Engineering to Tribology | Hiroshi Komiya | 3 | 192 |
General Survey | Modern Tribology in Life Cycle Assessment | Koji Kato and Kosuke Ito | 3 | 193 | |
Explanations | Tribology in Aero Engine | Atsushi Matsuura | 3 | 204 | |
Additive Technology for Automatic Transmission Fluid | Kenji Yatsunami | 3 | 211 | ||
Viscosity Change of Automatic Transmission Fluid|Comparison between Field Data and Shear Stability Test Results| | Hitoshi Hamaguchi and Tsuyoshi Yuki | 3 | 217 | ||
Tribo-Simulation Models and Tribo-Design | Masato Tanaka | 3 | 223 | ||
Lecture | Surface Analysis Using High Resolution Electron Energy Loss Spectroscopy | Jun Yoshinobu | 3 | 230 | |
Up-to-date News | Introduction of Tribology to High School Students through Science Partnership Program | Masaji Iwasaki and Shinya Sugiyama | 3 | 236 | |
Topics | Origin of Words on Tribology and Jyun-Katsu | Yorikazu Shimotsuma and Masanori Ogata | 3 | 240 | |
Original Contribution | Quantitative Evaluation of Torque and Motion Sensation of Hinges for Mobile PCs | Kosei Tanahashi, Hiroyuki Takenoshita and Masao Kohchi | 3 | 246 |
Special Issues | Category | Title | Authors | No. | Page |
Winners of 2005 Distinguished Tribologist Award | 4 | 259 | |||
Winners of 2005 Best Paper Award | 4 | 260 | |||
Winners of 2005 Tribo-Technology Award | 4 | 262 | |||
Winners of 2005 Award for Young Tribologists | 4 | 265 | |||
Messages to Tribologists | Serial | Keyword is Tribology | Toshimi Takajo | 4 | 268 |
Special Issue on Trends in Environmentally Friendly Lubricants | Prologue to the Special Issue on "Trends in Environmentally Friendly Lubricants" | Katsuya Takigawa | 4 | 269 | |
Explanations | Environmental Adaptation of Automotive Engine Oils and Their Future Technical Issues | Satoshi Ogano | 4 | 270 | |
Trends in Biodegradable Hydraulic Fluids | Hiroshi Kawasaki | 4 | 276 | ||
Trends in Used Lubricating Oil Recycling | Kazuhiko Suzuki | 4 | 282 | ||
Trends in Refrigeration Lubricants for Natural Refrigerants and Their Applications | Kazuo Tagawa | 4 | 288 | ||
Lecture | Surface Analysis by Secondary Ion Mass SpectroscopyiSIMSj | Toshimitsu Numata | 4 | 294 | |
Original Contributions | Low Temperature Degradation of Lubricant Oil for Gasoline Engine | Hiroshi Moritani and Hiromi Kawai | 4 | 300 | |
Sealing Characteristics of Flat Metallic Gasket|Observation of Contacting State Using Thin Polycarbonate Film| | Yoshio Matsuzaki, Isami Nitta, Yutaka Ito, Munetoshi Ikegami and Satoshi Hasegawa | 4 | 308 | ||
Depletion and Replenishment of Molecularly Thin PFPE Lubricant Film on DLC Surface of Magnetic Disks | Yasunaga Mitsuya, Hedong Zhang, Fumihiro Hayakawa, Junichi Ohgi and Kenji Fukuzawa | 4 | 316 | ||
A New Technique for the Simultaneous Measurement of Thickness and Coverage of Boundary Film with Complex Impedance Analysis | Yoh Akiyama and Ken Nakano | 4 | 328 |
Special Issues | Category | Title | Authors | No. | Page |
Messages to Tribologists | Serial | What is the Difference between Guitars and Violins? | Takashi Nakamura | 5 | 339 |
Special Issue on Energy Saving and Tribology | Prologue to the Special Issue on "Energy Saving and Tribology" | Moritsugu Kasai | 5 | 340 | |
Explanations | Energy Saving and Tribology in Rolling Bearings | Kazutoshi Toda | 5 | 341 | |
Energy Saving and Tribology in Plain Bearings | Atsushi Okado and Arihiro Kimura | 5 | 347 | ||
Energy Saving and Tribology in Impregnated Sintered Bearings | Shigeyuki Tanabe | 5 | 353 | ||
Energy Saving and Tribology in Oil Seals | Shinji Nagasawa | 5 | 359 | ||
Energy Saving and Tribology in Gears | Kazuteru Nagamura | 5 | 365 | ||
Energy Saving and Tribology in Hydraulic Devices for Construction Machinery | Genroku Sugiyama | 5 | 371 | ||
Lecture | Transmission Electron Microscopy | Tokushi Kizuka | 5 | 377 | |
Original Contributions | Friction and Anti-Wear Characteristics of Ashless Friction Modifiers in the Presence of Sulfur and Phosphorus (S-P) Type Additive | Shigeyuki Gotoh and Masayoshi Muraki | 5 | 383 | |
Effect of Roller Profile on Characteristics of Spherical Roller Bearing (Part 1)|Examination Using a Quasi-Static Analysis Program| | Tomoya Sakaguchi and Yoshinobu Akamatsu | 5 | 391 | ||
Effect of Roller Profile on Characteristics of Spherical Roller Bearing (Part 2)|Experimental Validation of the Quasi-Static Analysis in Terms of Bearing Torque| | Tomoya Sakaguchi and Yoshinobu Akamatsu | 5 | 400 | ||
Compensation for Flying-Height Loss due to Thermal Protrusion of Magnetic Head|Comparison of Optical Measurement Using an Active Slider with Built-In Thermal Actuator and Numerical Simulation Results| | Masayuki Kurita, Toshiya Shiramatsu, Kouji Miyake, Hideaki Tanaka, Mike Suk and Shozo Saegusa | 5 | 406 |
Special Issues | Category | Title | Authors | No. | Page |
Messages to Tribologists | Serial | An Encounter with Rolling Bearings | Shoji Noguchi | 6 | 417 |
Special Issue on Tribology in Advanced Science | Prologue to the Special Issue on "Tribology in Advanced Science" | Hiroyuki Ohta | 6 | 418 | |
Explanations | Tribology in the H-IIA Rocket and Satellites | Masataka Nosaka and Shingo Obara | 6 | 419 | |
Tribology in the Large Scale Telescope "SUBARU" | Sadaji Hayama | 6 | 426 | ||
Tribological Approach for Structural Control Technology | Jun Hirai | 6 | 432 | ||
Tribology in "Shinkansen" | Takanori Obara | 6 | 438 | ||
Tribology in the Walking Humanoid Robot | Shuuji Kajita | 6 | 444 | ||
Lecture | Ellipsometry | Toshiyasu Tadokoro | 6 | 450 | |
Original Contributions | Wear Properties of Bi-Added Cu-Base Sintered Alloys Sliding under Electric Current | Kazuyuki Handa and Shunichi Kubo | 6 | 456 | |
Analysis of Contact Stiffness for Coated Surface Using Uniformly Distributed Pressure Model, and Measurement of Young's Modulus of Thin Hard Film | Tomohiro Motoda, Masayuki Shima, Shinya Sasaki and Koji Miyake | 6 | 463 |
Special Issues | Category | Title | Authors | No. | Page |
The Valediction by the Ex-President | Motohiro Kaneta | 7 | 481 | ||
The Inaugural Address by the President | Koji Kato | 7 | 482 | ||
Messages to Tribologists | Serial | An Challenge to Produce New Industry Based on Tribology | Kazuo Hokkirigawa | 7 | 484 |
Special Issue on Control Technologies and Utilization of Friction and Wear | Prologue to the Special Issue on "Control Technologies and Utilization of Friction and Wear" | Makoto Hemmi | 7 | 485 | |
Explanations | Control of Friction in Automobiles: Vehicle Control and Tire Contact Force | Yoshihiro Suda | 7 | 486 | |
Advanced Control Technology for Braking Systems in Railway Vehicles | Masanobu Nankyo | 7 | 493 | ||
Wear Control of Ultrasonic Motors for Precision Positioning | Koshi Adachi | 7 | 499 | ||
Control of Polishing Properties Using Magnetic and Electric Fields | Noritsugu Umehara and Yoichi Akagami | 7 | 506 | ||
Dynamical Mechanisms of Chemical Mechanical Polishing Based on the Frictional Characteristics | Yoshio Homma | 7 | 512 | ||
Lecture | Nanoindentation | Koji Miyake, Tomohiro Motoda and Shinya Sasaki | 7 | 518 | |
Original Contributions | Optimization of Reynolds Equation and Application of CIP Method for Analysis of Mixed Elastohydrodynamic Lubrication | Kazunori Ichimaru | 7 | 524 | |
New Evaluation Method for Lubricity of Hot-Rolling Oil Using SRV Test Machine | Akira Azushima, Wei-dong Xue and Koshiro Aoki | 7 | 532 |
Special Issues | Category | Title | Authors | No. | Page |
Messages to Tribologists | Serial | Tribology: The World of Environmentally Friendly Technology | Toshiaki Wakabayashi | 8 | 557 |
Special Issue on Tribology in Home Appliances and Office Automation Equipment | Prologue to the Special Issue on "Tribology in Home Appliances and Office Automation Equipment" | Takanori Obara | 8 | 558 | |
Explanations | Tribology in Compressors for Home Appliances | Hideto Nakao and Koei Matsukawa | 8 | 559 | |
Tribology in Oil-Impregnated Sintered Bearing for Fan Motors | Takeshi Yanase | 8 | 565 | ||
Tribology in Plastic Sliding Materials for Office Automation Equipment | Shin-ya Kikutani | 8 | 571 | ||
Tribology in Liquid Crystal Displays | Shizuo Murata | 8 | 577 | ||
Lecture | Infrared Spectroscopy | Hidetaka Nanao and Shigeyuki Mori | 8 | 583 | |
Report of Research Group | The Report of Joint Research on the Lubricating Grease Life and the Degradation Process of Urea Greases | Research Group on Lubricating Greases | 8 | 589 | |
Original Contributions | Quantification of Surface Morphology of Lubricant Films with Functional End Groups by Using Molecular Dynamics Simulation|Periodic Change of Morphology Depending on Film Thickness| | Susumu Ogata, Hedong Zhang, Kenji Fukuzawa and Yasunaga Mitsuya | 8 | 595 | |
Development of Diagnosis System for Machines Using Compound Detection of Acoustic Emission and VibrationiPart 1j|Introduction and Performance Evaluation of the System| | Takeo Yoshioka, Shigeo Shimizu, Hiroki Mano, Atsushi Korenaga, Hidehiro Inaba and Toshiaki Wakabayashi | 8 | 607 |
Special Issues | Category | Title | Authors | No. | Page |
Messages to Tribologists | Serial | Thanks to Tribology | Koji Kato | 9 | 619 |
Special Issue on Micro/Nanotribology for Automobiles | Prologue to the Special Issue on "Micro/Nanotribology for Automobiles" | Akemi Ito | 9 | 620 | |
Explanations | In-Situ Observation of Micro/Nanofilms under Shearing Conditions | Shigeyuki Mori | 9 | 621 | |
Mechanism of Friction Reduction and Nanoscale Controlling Factors in MoDTC/ZDDP Tribofilms | Jiping Ye | 9 | 627 | ||
Tribological Properties of Nanomultilayer Coatings for Piston Rings | Kiyoyuki Kawai | 9 | 633 | ||
Increase of Traction Coefficient due to Microtexture on Surface | Toshikazu Nanbu and Yoshiteru Yasuda | 9 | 639 | ||
Lecture | Raman Spectroscopy | Masaaki Yumoto | 9 | 645 | |
Original Contributions | Rolling Contact Fatigue Characteristics of Ball Made of Newly Developed Bearing Steel with Addition of Si and Mo | Hiroshi Ohsaki, Ryousuke Ano, Akira Yoshida, Masahiro Fujii and Katsuhiro Iwasaki | 9 | 652 | |
A Study on Sliding -Rolling Contact Fatigue of Maraging Steel Roller | Yuji Ohue, Koji Matsumoto and Katsumi Yamano | 9 | 660 | ||
Visualization of Dewetting of Nanometer Thick Lubricant | Kenji Fukuzawa, Taichi Shimuta, Tomohiko Yoshida, Hedong Zhang and Yasunaga Mitsuya | 9 | 668 | ||
Effects of Chromium Content on Wear Resistance of Ni-Hard Cast Irons | Haruhiro Osada, Motohiro Kaneta, Ken Okada and Asahiko Ishiyama | 9 | 676 |
Special Issues | Category | Title | Authors | No. | Page |
Messages to Tribologists | Serial | Hope to be Faithful and Truthful to Needs in Age and Academia | Takashi Yamamoto | 10 | 687 |
Special Issue on Tribology in Medical Care and Welfare | Prologue to the Special Issue on "Tribology in Medical Care and Welfare" | Yoshinori Takeichi | 10 | 688 | |
Explanations | Tribology in Medical Care, Welfare and Life | Ken Ikeuchi | 10 | 689 | |
Tribology in Restorative Dental Materials | Hisao Fukui | 10 | 695 | ||
Tribology in Prosthetics and Orthotics | Makoto Ninomiya and Katsuya Masuda | 10 | 701 | ||
Tribological Experiment for Evaluation of Friction and Wear in Joint Prostheses | Teruo Murakami | 10 | 707 | ||
Hemodynamic Tribology in Artificial Hearts | Takashi Yamane, Masahiro Nishida, Osamu Maruyama and Ryo Kosaka | 10 | 713 | ||
Biotribology in Biomaterials | Kiyoshi Mabuchi and Rina Sakai | 10 | 719 | ||
Explanation | Flexible Tactile Sensors Using Organic Transistors | Takao Someya | 10 | 725 | |
Lecture | Friction Force Microscope: Fundamentals and Applications | Masamichi Fujihira and Miki Akiyama | 10 | 731 | |
Original Contributions | Development of Micro Traction Drive Modified from Tapered Roller Bearings | Isamu Shiotsu, Susumu Matsumoto, Yasuyoshi Tozaki, Takeshi Yoshimi and Syuichi Isayama | 10 | 736 | |
Generation Process of White Etching Area in Rolling Contact Fatigue | Kazuhiko Hiraoka, Misaki Nagao, Harushige Tsubakino and Atushi Yamamoto | 10 | 744 | ||
Correlation of Abrasive Wear Phenomenon and AE Signals | Alan Hase, Masaki Wada and Hiroshi Mishina | 10 | 752 |
Special Issues | Category | Title | Authors | No. | Page |
Messages to Tribologists | Serial | Between Study and Development | Yasuhisa Ando | 11 | 763 |
Special Issue on Does Tribology Describe Wear Scientifically? | Prologue to the Special Issue on "Does Tribology Describe Wear Scientifically?" | Takashi Nakano and Hiroshi Mishina | 11 | 764 | |
Explanations | The Present State and Near Future Trend of Wear Research | Koji Kato | 11 | 766 | |
What is the Fundamental Phenomenon of Wear? | Hiroshi Mishina | 11 | 773 | ||
Relation between Frictional Work and Wear|Does Tribology Describe Wear Scientifically?| | The late Akio Kohno | 11 | 779 | ||
Wear as an Earth Science | Tadashi Sasada | 11 | 782 | ||
Does the Adhesive Theory Describe Wear Scientifically? | Yasuhisa Ando | 11 | 788 | ||
Severe Wear and Mild Wear|Their Ontology, Epistemology and Axiology| | Ken'ichi Hiratsuka | 11 | 794 | ||
Is Wear Well Described Scientifically Now? | Takashi Nakano | 11 | 800 | ||
Lecture | Electron Spin Resonance(ESR) and Nuclear Magnetic Resonance(NMR) | Masahiro Yanagisawa | 11 | 806 | |
Original Contributions | Running Performance of Tandem Stages Type Traction Drive Modified from Angular Contact Ball Bearings | Isamu Shiotsu, Susumu Matsumoto, Yasuyoshi Tozaki, Takeshi Yoshimi and Syuichi Isayama | 11 | 812 | |
TOF-SIMS Analysis of Boundary Film Derived from Multi-Additives | Tomoo Kubo, Hidetaka Nanao, Ichiro Minami, Shigeyuki Mori and Toshihiko Ichihashi | 11 | 819 | ||
Relationship between Structure and Tribological Properties of Ionic Liquids Composed of Imidazolium Cations | Hideto Kamimura, Takeru Chiba, Tomoo Kubo, Hidetaka Nanao, Ichiro Minami and Shigeyuki Mori | 11 | 826 | ||
Mechanism of Sliding Friction in Air for Molybdenum Disulfide Films Sputtered onto SUS440C Steel Rollers | Kiyonori Koguma, Michiaki Ikeda, Kenji Sunahara, Kenji Matsuda and Motohiro Kaneta | 11 | 835 |
Special Issues | Category | Title | Authors | No. | Page |
Messages to Tribologists | Serial | Collaboration Develops Tribology | Yoshiro Iwai | 12 | 847 |
Special Issue on Challenge to Superlubricity | Prologue to the Special Issue on " Challenge to Superlubricity" | Takashi Nakano | 12 | 848 | |
Explanations | Overview of the Study on Superlubricity | Motohisa Hirano | 12 | 849 | |
Mechanism of Superlubricity | Naruo Sasaki and Kouji Miura | 12 | 855 | ||
Superlow Friction by Nitrogen Gas | Koshi Adachi | 12 | 861 | ||
Superlow Friction of Polymer Gel | Jian Ping Gong | 12 | 867 | ||
Superlow Friction of Solid Lubricants in Vacuum | Masanori Iwaki | 12 | 873 | ||
Superlubricity of C60 Molecular Bearings and Its Application | Kouji Miura and Naruo Sasaki | 12 | 879 | ||
Original Contributions | Analysis of Traction Properties of Fluids Using Molecular Dynamics Simulations (Part 1) |Determination of the Appropriate Simulation Conditions| | Hitoshi Washizu, Shuzo Sanda, Toshihide Ohmori and Atsushi Suzuki | 12 | 885 | |
Analysis of Traction Properties of Fluids Using Molecular Dynamics Simulations (Part 2)|Analysis of Molecular Mechanism of Traction Focusing on Intra-and Intermolecular Interaction| | Hitoshi Washizu, Shuzo Sanda, Toshihide Ohmori and Atsushi Suzuki | 12 | 892 | ||
Effect of Applied Electric Voltage on the Tribological Characteristics of a-CNx Film Sliding against Stainless Steel Ball | Takahiro Yamamoto, Noritsugu Umehara and Yoshio Fuwa | 12 | 900 | ||
Study on Gas Pumping Characteristics in Radial Lip Seals | Joichi Sugimura, Seigo Gondo, Yuji Yamamoto, Shinya Nakaoka and Yuki Sato | 12 | 906 | ||
Effect of Retention Time in Vacuum on Analytical Values by EPMA for Oxygen Contents and S/Mo Ratio of Molybdenum Disulfide Sputtered films | Kiyonori Koguma, Michiaki Ikeda, Nobuhiko Ota, Kenji Matsuda and Motohiro Kaneta | 12 | 913 | ||
Effect of Permeability and Groove on Friction Characteristics between Web and Steel Roller | Masashi Sasaki and Hiromu Hashimoto | 12 | 921 |