Chief researcher, Kajima corporation, Japan
Dr. Kuniaki Mihara is a distinguished Chief Researcher at Kajima Technical Research Institute (KaTRI), with over two decades of expertise in human-built environmental interaction. His work focuses on thermal comfort, occupant-centric control systems, intellectual productivity, and biophilic design. Holding a Ph.D. in Building from the National University of Singapore, Dr. Mihara is also a LEED Accredited Professional (BD+C) and an ASHRAE Certified HVAC Designer. His contributions have significantly advanced sustainable and occupant-friendly building solutions, particularly in Southeast Asia.
Profiles
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Education
Dr. Mihara earned his Bachelor and Master of Engineering degrees in Architecture from Tohoku University, Japan, in 2004 and 2006, respectively. His early research focused on passive ventilation measurement methods in residences. He later pursued a Ph.D. in Building at the National University of Singapore, completing it in 2020. His doctoral thesis, titled “Human Response Studies of a Dedicated Outdoor Air System with Ceiling Fans in the Tropics,” explored the integration of ceiling fans with dedicated outdoor air systems to enhance thermal comfort in tropical climates. This research has been instrumental in developing energy-efficient cooling strategies suitable for hot and humid environments.
Experience
Since joining Kajima Technical Research Institute in 2006, Dr. Mihara has progressed from Research Engineer to Chief Researcher. His career spans over 20 years, during which he has led numerous projects focusing on thermal comfort, energy efficiency, and sustainable building design. Notably, he has been involved in the development of hybrid cooling systems and occupant-centric control strategies. His work has been pivotal in promoting energy-efficient practices in building design across Southeast Asia. Dr. Mihara’s expertise has also been recognized through his participation in technical reference groups and collaborations with academic institutions.
Awards and Honors
Dr. Mihara’s contributions to building science have been recognized with several awards. In 2019, he received the SHASE Academic Paper Award for his work on evaluating the compatibility of renewable energy with thermal loads in district heating and cooling systems. His research has been widely cited, reflecting its impact on the field. Additionally, his involvement in developing energy-efficient cooling technologies has garnered attention from both industry and academia, further solidifying his reputation as a leader in sustainable building research.
Research Focus
Dr. Mihara’s research centers on enhancing thermal comfort and energy efficiency in buildings. He specializes in integrating ceiling fans with dedicated outdoor air systems, developing occupant-centric control strategies, and exploring the psychological impacts of indoor environments. His work often involves interdisciplinary approaches, combining engineering, architecture, and human factors to create sustainable and comfortable living and working spaces. Through extensive field studies and collaborations, Dr. Mihara aims to develop practical solutions that address the challenges of building design in tropical climates.
Publication Top Notes
1. How Does Green Coverage Ratio and Spaciousness Affect Self-Reported Performance and Mood?
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Publication: Building and Environment, November 2023
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DOI: 10.1016/j.buildenv.2023.110939
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Summary: This study investigates the impact of green coverage and spatial openness on individuals’ self-reported performance and mood. The findings suggest that higher green coverage and increased spaciousness positively influence occupants’ mood and perceived performance, emphasizing the importance of biophilic design in urban environments.
2. A Semi-Automatic Data Management Framework for Studying Thermal Comfort, Cognitive Performance, Physiological Performance, and Environmental Parameters in Semi-Outdoor Spaces
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Publication: Sustainability, December 2022
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DOI: 10.3390/su15010183
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Summary: This paper presents a semi-automatic framework designed to manage and analyze multidimensional data related to thermal comfort, cognitive performance, physiological responses, and environmental parameters in semi-outdoor spaces. The framework aims to streamline data processing, reducing errors and improving efficiency in environmental studies.
3. Transient Thermal and Physiological Responses from Air-Conditioned Room to Semi-Outdoor Space in the Tropics
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Publication: Building and Environment, November 2022
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DOI: 10.1016/j.buildenv.2022.109611
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Summary: This study examines the immediate thermal and physiological responses of individuals transitioning from air-conditioned indoor environments to semi-outdoor spaces in tropical climates. Results indicate that occupants quickly adapt to the new environment, with minimal discomfort, highlighting the potential for integrating semi-outdoor spaces in building designs.
4. Environmental Satisfaction, Mood, and Cognitive Performance in Semi-Outdoor Space in the Tropics
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Publication: Building and Environment, May 2022
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DOI: 10.1016/j.buildenv.2022.109051
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Summary: This research explores the effects of semi-outdoor environments on environmental satisfaction, mood, and cognitive performance. Findings suggest that semi-outdoor spaces can support short-term work activities without compromising performance, provided certain environmental conditions are met.
5. Assessment of Airflow and Heat Transfer Around a Thermal Manikin in a Premise Served by DOAS and Ceiling Fans
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Publication: Building and Environment, April 2022
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DOI: 10.1016/j.buildenv.2022.108902
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Summary: This paper investigates the airflow patterns and heat transfer characteristics around a thermal manikin in environments utilizing Dedicated Outdoor Air Systems (DOAS) combined with ceiling fans. The study provides insights into optimizing thermal comfort through strategic airflow management.
6. Physiological and Psychological Responses and Cognitive Performance with Window View
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Publication: Science and Technology for the Built Environment, March 2022
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DOI: 10.1080/23744731.2022.2049639
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Summary: This study examines the impact of window views on occupants’ physiological and psychological responses, as well as cognitive performance. Results indicate that views of nature can reduce stress and enhance cognitive functions, underscoring the value of incorporating natural elements in building design.
7. Thermal and Perceived Air Quality Responses Between a Dedicated Outdoor Air System with Ceiling Fans and Conventional Air-Conditioning System
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Publication: Building and Environment, March 2021
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DOI: 10.1016/j.buildenv.2020.107574
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Summary: This research compares thermal comfort and perceived air quality between spaces using DOAS with ceiling fans and those with conventional air-conditioning systems. Findings suggest that DOAS with ceiling fans can achieve comparable comfort levels while reducing energy consumption.
8. Thermal Comfort and Energy Performance of a Dedicated Outdoor Air System with Ceiling Fans in Hot and Humid Climate
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Publication: Energy and Buildings, November 2019
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DOI: 10.1016/j.enbuild.2019.109448
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Summary: This study evaluates the thermal comfort and energy performance of integrating ceiling fans with DOAS in hot and humid climates. The results demonstrate significant energy savings without compromising occupant comfort.
9. Effects of Temperature, Air Movement, and Initial Metabolic Rate on Thermal Sensation During Transient State in the Tropics
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Publication: Building and Environment, May 2019
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DOI: 10.1016/j.buildenv.2019.03.030
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Summary: This paper investigates how temperature, air movement, and initial metabolic rate affect thermal sensation during transitional periods in tropical climates. The study provides insights into designing HVAC systems that accommodate transient thermal conditions.
10. Time Series Prediction of CO₂, TVOC, and HCHO Based on Machine Learning at Different Sampling Points
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Publication: Building and Environment, December 2018
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DOI: 10.1016/j.buildenv.2018.09.054
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Summary: This study applies machine learning techniques to predict indoor air pollutants like CO₂, TVOC, and HCHO. The predictive models aim to enhance indoor air quality monitoring and management.
Conclusion
Dr. Kuniaki Mihara exemplifies a modern, impactful researcher whose work bridges academic excellence and practical innovation in sustainable building design and human-environment interaction. His technical expertise, project leadership, and real-world application of research outcomes make him highly deserving of the Best Researcher Award.