| Published Papers |
| No. | Ｔitle | Journal | Vol | No | Start Page | End Page | Publication date | DOI | Referee |
| 1 | Experimental and numerical investigation of high-flow-rate injection focusing on improved thermal efficiency and output performance in low-pressure direct-injection hydrogen engines | Journal of the Energy Institute | | | | | Apr. 2026 | https://doi.org/10.1016/j.joei.2026.1024631 | |
| 2 | Experimental and numerical investigation of a low-pressure direct-injection hydrogen engine focusing on high thermal efficiency with near-zero emissions | International Journal of Hydrogen Energy | | | | | Dec. 2025 | https://doi.org/10.1016/j.ijhydene.2025.1524181 | |
| 3 | Acoustic emission analysis of seizure transition process between steel journals and aluminum alloy plain bearings | Tribology International | 202 | | 110324 | 110324 | Feb. 2025 | https://doi.org/10.1016/j.triboint.2024.1103241 | |
| 4 | Development of Oil Film Pressure Measurement System for Engine Sliding Parts | Tribology Online | | | | | Nov. 15, 2023 | https://doi.org/10.2474/trol.18.4491 | |
| 5 | Clarification of Fuel and Oil Flow Behavior Around the Piston Rings of Internal Combustion Engines  | SAE Technical Paper Series | | | | | Sep. 29, 2023 | https://doi.org/10.4271/2023-32-00471 | |
| 6 | The Verification of Engine Analysis Model Accuracy by Measuring Oil Film Pressure in the Main Bearings of a Motorcycle High-Speed Engine Using a Thin-Film Sensor | Lubricants | 10 | 11 | | | Nov. 2022 | https://doi.org/10.3390/lubricants101103141 | Refereed |
| 7 | Measurement of Piston Pin-Bore Oil Film Pressure under Engine Operation | Lubricants | 10 | 10 | | | Oct. 2022 | https://doi.org/10.3390/lubricants101002581 | Refereed |
| 8 | Effect of high compression ratio on improving thermal efficiency and NOx formation in jet plume controlled direct-injection near-zero emission hydrogen engines | International Journal of Hydrogen Energy | 47 | 73 | 31459 | 31467 | Aug. 26, 2022 | https://doi.org/10.1016/j.ijhydene.2022.07.0471 | Refereed |
| 9 | Observation of Behavior of Post-injected Fuel Film Using Photochromism Visualization Technique | Transactions of Society of Automotive Engineers of Japan | 53 | 3 | 466 | 471 | May. 2022 | https://doi.org/10.11351/jsaeronbun.53.4661 | Refereed |
| 10 | Effect of supercharging on improving thermal efficiency and modifying combustion characteristics in lean-burn direct-injection near-zero-emission hydrogen engines | International Journal of Hydrogen Energy | 47 | 2 | 1319 | 1327 | Jan. 5, 2022 | https://doi.org/10.1016/j.ijhydene.2021.10.0611 | Refereed |
| 11 | Effect of modified combustion chamber configuration and enhanced squish flow on improving thermal efficiency in jet-plume-controlled direct-injection near-zero emission hydrogen engines | International Journal of Engine Research | 24 | 7 | 2897 | 2907 | 2022 | https://doi.org/10.1177/146808742211352771 | Refereed |
| 12 | Excellent seizure and friction properties achieved with a combination of an a-c:H:Si dlc-coated journal and an aluminum alloy plain bearing | Coatings | 11 | 9 | | | Sep. 2021 | https://doi.org/10.3390/coatings110910551 | Refereed |
| 13 | Realization of High Thermal Efficiency Near-zero Emissions and Additional Improved Performance by Optimizing Injected Spray Configuration and Injection Timing in Direct Injection Hydrogen Engines | 自動車技術会論文集(Web) | 51 | 1 | | | 2020 | | Refereed |
| 14 | Attainment of High Thermal Efficiency and Near-zero Emissions by Optimizing Injected Spray Configuration in Direct Injection Hydrogen Engines | SAE Technical Papers | | December | | | Dec. 19, 2019 | https://doi.org/10.4271/2019-01-23061 | Refereed |
| 15 | Research on evaluation of hydrogen jet behavior and assessment of cooling loss reduction by measuring local heat flux in direct injection hydrogen engines | Transactions of the JSME | 85 | 875 | 18-00427 | 18-00427 | Jul. 2019 | https://doi.org/10.1299/transjsme.18-004271 | Refereed |
| 16 | Near-zero emissions with high thermal efficiency realized by optimizing jet plume location relative to combustion chamber wall, jet geometry and injection timing in a direct-injection hydrogen engine | International Journal of Hydrogen Energy | 44 | 18 | 9456 | 9465 | Apr. 2019 | https://doi.org/10.1016/j.ijhydene.2019.02.0581 | Refereed |
| 17 | Effect of Modified Jet Configuration of Rich Mixture Plume Combustion on Performance Improvement in High Pressure Direct Injection Hydrogen Engines | Transactions of Society of Automotive Engineers of Japan | 44 | 5 | 1141 | 1146 | 2013 | https://doi.org/10.11351/jsaeronbun.44.11411 | Refereed |
| 18 | Effect of fuel jet location and ignition point in the combustion chamber on thermal efficiency and NOx formation in rich mixture plume ignition combustion of high pressure direct injection hydrogen engines | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B | 79 | 808 | 2810 | 2817 | 2013 | https://doi.org/10.1299/kikaib.79.28101 | Refereed |
| 19 | Optimization of Hydrogen Jet Configuration by Single Hole Nozzle and High Speed Laser Shadowgraphy in High Pressure Direct Injection Hydrogen Engines | International Journal of Automotive Engineering | 3 | 1 | 1 | 8 | 2012 | https://doi.org/10.20485/jsaeijae.3.1_11 | Refereed |
| 20 | Reduction in NOx Formation by Ignition-combustion of Rich Mixture Plume in High Pressure Direct Injection Hydrogen Engines | Marine Engineering | 47 | 3 | 429 | 436 | 2012 | https://doi.org/10.5988/jime.47.4291 | Refereed |
| 21 | A Study on Hydrogen Jet Configuration and Flame Propagation by Shadowgraphic Visualization in High Pressure Direct Injection Hydrogen Engines | | 43 | 156-11 | 1209 | 1214 | 2011 | | Refereed |
| 22 | Optimization of hydrogen jet configuration by single hole nozzle and high speed laser shadowgraphy in high pressure direct injection hydrogen engines | SAE Technical Papers | | | | | 2011 | https://doi.org/10.4271/2011-01-20021 | Refereed |
| 23 | Development of high pressure H2 gas injectors, capable of injection at large injection rate and high response using a common-rail type actuating system for a 4-cylinder, 4.7-liter total displacement, spark ignition hydrogen engine | SAE Technical Papers | | | | | 2011 | https://doi.org/10.4271/2011-01-20051 | Refereed |
| 24 | Characteristics of Low NOx Formation of Over-Rich-Mixture Plume Combustion in High Pressure Direct Injection SI Hydrogen Engines | Transactions of the Society of Automotive Engineers of Japan | 41 | 3 | 685 | 690 | May. 2010 | | Refereed |
| 25 | Performance of a common-rail type high pressure UP to 10 to 20 MPA hydrogen gas injector developed for DI hydrogen fueled engines | 17th World Hydrogen Energy Conference 2008, WHEC 2008 | 2 | | 854 | 857 | 2008 | | Not refereed |
| 26 | A development of a high pressure H2 gas injector with high response by using common-rail injection system for direct injection H2 fuelled engines | 16th World Hydrogen Energy Conference 2006, WHEC 2006 | 2 | | 1559 | 1565 | 2006 | | Refereed |
| MISC |
| No. | Ｔitle | Journal | Vol | No | Start Page | End Page | Publication date |
| 1 | Prologue to the Special Issue on “Research and Development Trends in Internal Combustion Engines, Component Parts and Measurement Technologies for Next-Generation Fuels” | JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS | 71 | 3 | 179 | 179 | Mar. 15, 2026 |
| 2 | Effect of ultra-fine bubbles on friction reduction in internal combustion engines | 日本トライボロジー学会トライボロジー会議予稿集(Web) | 2025 | | | | 2025 |
| 3 | Effects of High Injection Rate on Thermal Efficiency in Low-Pressure Direct Injection Hydrogen Engines | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 4 | Effect of Excess Air Ratio and Engine Speed on Instantaneous Heat Flux in Motorcycle Hydrogen Engines | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 5 | Reduction of Engine Bearing Friction with Engine Oils Containing Ultrafine Bubbles-Effect of generation density and oil viscosity- | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 6 | Effect of Engine Oil Containing Ultrafine Bubbles on Reduction of Friction Loss in Piston-Cylinder System-Influence of Cylinder Bore Honing Specifications and Lubricant Viscosity- | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 7 | Engine for Alternative Fuels | 自動車技術(Web) | 79 | 8 | | | 2025 |
| 8 | Effect of Fuel Supply System on Instantaneous Heat Flux at the Cylinder Liner Wall of Motorcycle Hydrogen Engine | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 9 | Effects of changes in water content of lubricant oil due to combustion in hydrogen engines on friction characteristics of piston systems. | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 10 | Comparative Verification of Measured and Numerical Analysis Results in Instantaneous Heat Flux of Motorcycle Hydrogen Engine | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 11 | Changes in Water Content and Elements in Lubricant Due to Differences in Operating Conditions and Cylinder Wall Temperature of a Hydrogen Engine and Their Effects on Friction and Seizure Characteristics of Engine Bearings | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 12 | Effect of Excess Air Ratio and Injection Timing on Piston Surface Temperature in Cylinder Direct Injection Hydrogen Engines by Temperature Measurement Method Using Multipoint Small Data Logger | 自動車技術会大会学術講演会講演予稿集(Web) | 2025 | | | | 2025 |
| 13 | Effect of Engine Oil Containing Nanobubbles by Ultrafine Pore Method on Reduction of Friction Loss in Piston System-Correlation between the Generation Density of Nanobubbles and Friction Reduction Effect- | 自動車技術会大会学術講演会講演予稿集(Web) | 2024 | | | | 2024 |
| 14 | Friction Reduction Effect Due to The Combination of Alcohol-Based Aqueous Solution and DLC Coating | 日本トライボロジー学会トライボロジー会議予稿集(Web) | 2024 | | | | 2024 |
| 15 | Engine for Alternative Fuels | 自動車技術(Web) | 78 | 8 | | | 2024 |
| 16 | Effects of Low Injection Pressure and Fuel Jet Specifications on Engine Performance in Direct Injection Hydrogen Engines | JSAE Symposium (CD-ROM) | | 6-24 | | | 2024 |
| 17 | Development of Low-Pressure Direct Injection Hydrogen Engine Based on Numerical Analysis of Mixture Formation Characteristics by LES | 自動車技術会大会学術講演会講演予稿集(Web) | 2024 | | | | 2024 |
| 18 | Effect of Fuel Jet Specifications on Engine Performance in Lowered Injection Pressure in Direct Injection Hydrogen Engines | 自動車技術会大会学術講演会講演予稿集(Web) | 2024 | | | | 2024 |
| 19 | Effects of operating conditions and cylinder wall temperature differences on the proportion of condensed water in lubricating oil in premixed hydrogen engine | 自動車技術会大会学術講演会講演予稿集(Web) | 2024 | | | | 2024 |
| 20 | Effect of Engine Oil Containing Nanobubbles by Ultrafine Pore Method on Reduction of Friction Loss in Piston System | 日本トライボロジー学会トライボロジー会議予稿集(Web) | 2024 | | | | 2024 |
| 21 | Low Friction in the EHL Regime of Engine Bearings with DLC-coated journals: Differences in after Sliding Bearing Surface Properties Using AFM | 内燃機関シンポジウム講演論文集(CD-ROM) | 34th | | | | 2023 |
| 22 | Engine for Alternative Fuels | 自動車技術(Web) | 77 | 8 | | | 2023 |
| 23 | Effects of modified combustion chamber configuration on In-Cylinder Pressure Oscillation and Hydrogen Concentration in Blow-by Gas in Direct Injection Hydrogen Engines | 内燃機関シンポジウム講演論文集(CD-ROM) | 34th | | | | 2023 |
| 24 | Elucidation of Seizure Phenomenon of Plain Bearings by Measuring AE in Bearing Tester | JSAE Engine Review (Web) | 12 | 7 | | | 2022 |
| 25 | Oil Film Pressure at Taper Shape of Piston Pin-bore during Engine Operation | 自動車技術会大会学術講演会講演予稿集(Web) | 2022 | | | | 2022 |
| 26 | Hydrogen power generation technology for mass introduction of renewable energy | | | | | | Feb. 10, 2021 |
| 27 | Low friction property of DLC coated crank journal under fluid lubrication | 自動車技術会大会学術講演会講演予稿集(Web) | 2021 | | | | 2021 |
| 28 | AE wave analysis for seizure phenomena between steel crank journal and aluminum alloy bearing by using bearing tester | 日本トライボロジー学会トライボロジー会議予稿集(CD-ROM) | 2021 | | | | 2021 |
| 29 | Seizure and friction properties in the combination of DLC (a-C: H: Si) coated journal and aluminum alloy plain bearing by using a bearing tester | 日本トライボロジー学会トライボロジー会議予稿集(CD-ROM) | 2021 | | | | 2021 |
| 30 | An approach to elucidate the mechanism of seizure phenomenon between crank journal and bearing | 自動車技術会大会学術講演会講演予稿集(Web) | 2021 | | | | 2021 |
| 31 | Visualization of Oil Behavior Around Engine Piston Using Photochromism Visualization Technique | 自動車技術会大会学術講演会講演予稿集(Web) | 2021 | | | | 2021 |
| 32 | Observation of Behavior of Post-injected Fuel Film Using Photochromism Visualization Technique | 自動車技術会大会学術講演会講演予稿集(Web) | 2021 | | | | 2021 |
| 33 | Tribo-chemistry for sliding surface of crank journal | 日本トライボロジー学会トライボロジー会議予稿集(CD-ROM) | 2021 | | | | 2021 |
| 34 | Characteristics of In-cylinder Pressure Oscillation by Increased Compression Ratio in Direct Injection Near-Zero Emission Hydrogen Engines | 内燃機関シンポジウム講演論文集(CD-ROM) | 32nd (Web) | | | | 2021 |
| 35 | Effect of DLC coating journal on improving seizure resistance of plain bearings | 内燃機関シンポジウム講演論文集(CD-ROM) | 32nd (Web) | | | | 2021 |
| 36 | Study on Dilution of Oil with Diesel Engine Fuel-Oil sampling method and properties of diluted oil- | 内燃機関シンポジウム講演論文集(CD-ROM) | 32nd (Web) | | | | 2021 |
| 37 | Realization of High Thermal Efficiency Near-zero Emissions and Additional Improved Performance in Direct Injection Hydrogen Engines | LEMA | | 542 | | | 2021 |
| 38 | Realization of High Thermal Efficiency Near-zero Emissions and Additional Improved Performance by Optimizing Injected Spray Configuration and Injection Timing in Direct Injection Hydrogen Engines | 水素エネルギーシステム | 45 | 2 | 84 | 90 | 2020 |
| 39 | Study on Improving Thermal Efficiency and Reducing NOx Emissions in High Thermal Efficiency and Near Zero Emission Direct Injection Hydrogen Engines-The Effect of Combustion Chamber Geometry on Thermal Efficiency and NOx Emissions- | 自動車技術会大会学術講演会講演予稿集(Web) | 2020 | | | | 2020 |
| 40 | Study on Improving Thermal Efficiency and Reducing NOx Emissions in High Thermal Efficiency and Near Zero Emission Direct Injection Hydrogen Engines-Findings of Combustion Characteristics Targeting to Realize Zero-NOx Emissions- | 自動車技術会大会学術講演会講演予稿集(Web) | 2020 | | | | 2020 |
| 41 | Effect of Sliding Surface Profile of Piston Rings Shaped by Running-in on Friction Loss of Piston-Cylinder System | 内燃機関シンポジウム講演論文集(CD-ROM) | 29th | | | | 2018 |
| 42 | Effect of Super Charging on Improving Thermal Efficiency and Combustion Characteristics in Lean Burn Direct Injection Hydrogen Engines | 内燃機関シンポジウム講演論文集(CD-ROM) | 29th | | | | 2018 |
| 43 | Evaluation of Jet Configuration and Cooling Loss from Cylinder Liner by Hydrogen Concentration Measurement in Blow-by Gas in Direct Injection Hydrogen Engine | 内燃機関シンポジウム講演論文集(CD-ROM) | 29th | | | | 2018 |
| 44 | Effect of Fuel Jet Location and Ignition Point in the Combustion Chamber on Thermal Efficiency and NOx Formation in Rich Mixture Plume Ignition Combustion of High Pressure Direct Injection Hydrogen Engines | 日本機械学会論文集 B編(Web) | 79 | 808 | | | 2013 |
| 45 | A Study on Hydrogen Jet Configuration and Flame Propagation by Shadowgraphic Visualization in High Pressure Direct Injection Hydrogen Engines | Transactions of Society of Automotive Engineers of Japan | 43 | 6 | 1209 | 1214 | 2012 |
| 46 | Fundamental Characteristics of Ignition-Combustion of Rich Mixture Plume in High Pressure Direct Injection Hydrogen Engines | Transactions of Society of Automotive Engineers of Japan | 42 | 4 | 903 | 908 | Jul. 2011 |
| 47 | Characteristics of Common-rail Type High Pressure Hydrogen Fuel Injector with High Response | 自動車技術会学術講演会前刷集 | | 79-06 | | | 2006 |
