Hug Synchronization Enhances Social Presence and Prosociality in Computer-Mediated Communication.

Masakazu Hirokawa

Eleuda Nuñez Masakazu Hirokawa Ari Hautasaari Kenji Suzuki 0002 Hug Synchronization Enhances Social Presence and Prosociality in Computer-Mediated Communication. 2026 January - March 1118-1133 17 IEEE Trans. Affect. Comput. 1 https://doi.org/10.1109/TAFFC.2025.3647660 db/journals/taffco/taffco17.html#NunezHHS26 streams/journals/taffco

Hayato Saiki Masakazu Hirokawa Modar Hassan Kenji Suzuki 0002 A large-scale mixed reality stadium for training coordinated tactical plays in basketball. 2025 6 Frontiers Virtual Real. https://doi.org/10.3389/frvir.2025.1722248 db/journals/frvir/frvir6.html#SaikiHHS25 streams/journals/frvir

Miyu Kashiyama Masakazu Hirokawa Ryuta Matsuno Keita Sakuma Takayuki Itoh ScaffoldViz: Interactive 3D visualization of ensemble decision trees based on relationship between weak learners. 320-335 2025 24 Inf. Vis. 4 https://doi.org/10.1177/14738716251335553 db/journals/ivs/ivs24.html#KashiyamaHMSI25 streams/journals/ivs

Maki Furue Masakazu Hirokawa Takayuki Itoh Fast Nearest Neighbor Retrieval based on Structural Features of Instruction Pairs in Preference Learning. 193-196 2025 IV https://doi.org/10.1109/IV68685.2025.00045 conf/iv/2025 db/conf/iv/iv2025.html#FurueHI25 streams/conf/iv Keita Sakuma Ryuta Matsuno Masakazu Hirokawa CDST-Viz: Tree-Based Segmentation and Visual Analytics of Concept Drift. 254-259 2025 IV https://doi.org/10.1109/IV68685.2025.00053 conf/iv/2025 db/conf/iv/iv2025.html#SakumaMH25 streams/conf/iv Eleuda Nuñez Zuzanna Radosz-Knawa Anna Kolbasa Paulina Zguda Alicja Kaminska Tymon Kukier Masakazu Hirokawa Kenji Suzuki 0002 Bipin Indurkhya Affective Communication via Haptic Technology: A Usability Study of a Huggable Device with Older Adults. 33-45 2025 ICSR+AI (1) https://doi.org/10.1007/978-981-95-2379-5_3 conf/socrob/2025-1 db/conf/socrob/ai2025-1.html#NunezRKZKKHSI25 streams/conf/socrob

Modar Hassan Maxwell Kennard Seiji Yoshitake Karlos Ishac Shion Takahashi SunKyoung Kim 0001 Takashi Matsui Masakazu Hirokawa Kenji Suzuki 0002 Augmenting the Sense of Social Presence in Online Video Games Through the Sharing of Biosignals. 98977-98989 2024 12 IEEE Access https://doi.org/10.1109/ACCESS.2024.3429247 db/journals/access/access12.html#HassanKYITKMHS24 streams/journals/access

Eriko Yamamoto Masakazu Hirokawa Eleuda Nuñez Yoko Hakuno Kazuki Sekine Saeka Miyahara Kenji Suzuki 0002 Yasuyo Minagawa Neural and Physiological Correlates of Prosocial Behavior: Temporoparietal Junction Activity in 3-year-old Children. 1977-1994 2024 36 J. Cogn. Neurosci. 9 https://doi.org/10.1162/jocn_a_02199 db/journals/jocn/jocn36.html#YamamotoHNHSMSM24 streams/journals/jocn

Shota Sawada SunKyoung Kim 0001 Masakazu Hirokawa Kenji Suzuki 0002 MirrorCampus: A Synchronous Hybrid Learning Environment That Supports Spatial Localization of Learners for Facilitating Discussion-Oriented Behaviors. 31 2024 8 Multimodal Technol. Interact. 4 https://doi.org/10.3390/mti8040031 db/journals/mti/mti8.html#SawadaKHS24

Kento Koizumi Modar Hassan Masakazu Hirokawa Kenji Suzuki 0002 Passive Add-On Mechanism for Electric Wheelchairs to Support Step Climbing Using Rider Motion. 3355-3362 2024 9 IEEE Robotics Autom. Lett. 4 https://doi.org/10.1109/lra.2024.3365289 db/journals/ral/ral9.html#KoizumiHHS24

Keigo Endo Hideki Kadone Modar Hassan Masakazu Hirokawa Kenji Suzuki 0002 Wearable Vibration Device for Supporting Postural Stability based on Proprioceptive Stimulation. 1-4 2024 EMBC https://doi.org/10.1109/EMBC53108.2024.10781840 conf/embc/2024 db/conf/embc/embc2024.html#EndoKHH024 Miyu Kashiyama Masakazu Hirokawa Ryuta Matsuno Keita Sakuma Takayuki Itoh Interactive Visualization of Ensemble Decision Trees Based on the Relations Among Weak Learners. 1-6 2024 IV https://doi.org/10.1109/IV64223.2024.00028 conf/iv/2024 db/conf/iv/iv2024.html#KashiyamaHMSI24 streams/conf/iv Ryuta Matsuno Keita Sakuma Masakazu Hirokawa Model Accuracy-Oriented Data Sets Visualization for Understanding Temporal Changes in Data. 186-189 2024 IV https://doi.org/10.1109/IV64223.2024.00041 conf/iv/2024 db/conf/iv/iv2024.html#MatsunoSH24 streams/conf/iv Taiga Noguchi Masakazu Hirokawa Shotaro Doki Kenji Suzuki 0002 Computational Modeling of Mental Health Checkup with Response-Based Characterization Using a Smart Mirror. 2549-2554 2024 SMC https://doi.org/10.1109/SMC54092.2024.10831537 conf/smc/2024 db/conf/smc/smc2024.html#NoguchiHD024 Yuto Nakajima Masakazu Hirokawa Modar Hassan Kenji Suzuki 0002 Augmenting the Perceptual Experience of Being Faced Using Gaze Modeling during Online Video Viewing. 4219-4224 2024 SMC https://doi.org/10.1109/SMC54092.2024.10831585 conf/smc/2024 db/conf/smc/smc2024.html#NakajimaHH024 Kosuke Isobe Masakazu Hirokawa Kenji Suzuki 0002 A Soft Wearable Robot to Support Scapular Adduction and Abduction for Respiratory Rehabilitation. 1-6 2023 RoboSoft https://doi.org/10.1109/RoboSoft55895.2023.10122123 conf/robosoft/2023 db/conf/robosoft/robosoft2023.html#IsobeHS23 Keisuke Ando Masakazu Hirokawa Kenji Suzuki 0002 Fusion of musculoskeletal and dynamic models to estimate knee joint impedance for exoskeleton control. 1-6 2023 SII https://doi.org/10.1109/SII55687.2023.10039164 conf/sii/2023 db/conf/sii/sii2023.html#AndoHS23 Kazuma Takaishi Hayato Saiki Masakazu Hirokawa Modar Hassan Kenji Suzuki 0002 A Sleeve Device using Electrical Impedance for Coaching Jump Shots in Basketball. 3222-3227 2023 SMC https://doi.org/10.1109/SMC53992.2023.10394485 conf/smc/2023 db/conf/smc/smc2023.html#TakaishiSHHS23 Misako Uchida Eleuda Nuñez Modar Hassan Masakazu Hirokawa Kenji Suzuki 0002 Paired Robotic Devices with Subtle Expression of Sadness for Enriching Social Connectedness. 254-263 2023 ICSR (1) https://doi.org/10.1007/978-981-99-8715-3_22 conf/socrob/2023-1 db/conf/socrob/icsr2023-1.html#UchidaNHHS23 Andreina Nunez Morales Eleuda Nuñez Masakazu Hirokawa Lorenzo Imbesi Ioannis Chatzigiannakis A Social Awareness Interface for Helping Immigrants Maintain Connections to Their Families and Cultural Roots: The Case of Venezuelan Immigrants. 188-193 2023 IMX https://doi.org/10.1145/3573381.3596461 https://www.wikidata.org/entity/Q130854465 conf/tvx/2023 db/conf/tvx/imx2023.html#MoralesNHIC23

SunKyoung Kim 0001 Masakazu Hirokawa Atsushi Funahashi Kenji Suzuki 0002 Parental Influence in Disengagement during Robot-Assisted Activities: A Case Study of a Parent and Child with Autism Spectrum Disorder. 39 2022 6 Multimodal Technol. Interact. 5 https://doi.org/10.3390/mti6050039 db/journals/mti/mti6.html#KimHF022

Ririka Masuda Kai Sasaki Masakazu Hirokawa Taku Hachisu Kenji Suzuki 0002 Posture Control of the Passenger Based on Caregiver's Wrist Motion for a Step-Climbing Stroller. 3016-3021 2022 7 IEEE Robotics Autom. Lett. 2 https://doi.org/10.1109/LRA.2022.3146600 db/journals/ral/ral7.html#MasudaSHHS22

Eleuda Nuñez Masakazu Hirokawa Ari Hautasaari Kenji Suzuki 0002 Remote Communication via Huggable Interfaces - Behavior Synchronization and Social Presence. 376:1-376:7 2022 CHI Extended Abstracts https://doi.org/10.1145/3491101.3519699 conf/chi/2022a db/conf/chi/chi2022a.html#NunezHH022 SunKyoung Kim 0001 Masakazu Hirokawa Atsushi Funahashi Kenji Suzuki 0002 What Can We Do with a Robot for Family Playtime? 847-849 2022 HRI https://doi.org/10.1109/HRI53351.2022.9889425 https://dl.acm.org/doi/10.5555/3523760.3523890 conf/hri/2022 db/conf/hri/hri2022.html#KimHF022

SunKyoung Kim 0001 Masakazu Hirokawa Soichiro Matsuda Atsushi Funahashi Kenji Suzuki 0002 Smiles as a Signal of Prosocial Behaviors Toward the Robot in the Therapeutic Setting for Children With Autism Spectrum Disorder. 599755 2021 8 Frontiers Robotics AI https://doi.org/10.3389/frobt.2021.599755 db/journals/firai/firai8.html#KimHMFS21

Bruno Leme Masakazu Hirokawa Hideki Kadone Kenji Suzuki 0002 A Socially Assistive Mobile Platform for Weight-Support in Gait Training. 459-468 2021 13 Int. J. Soc. Robotics 3 https://doi.org/10.1007/s12369-019-00550-x https://www.wikidata.org/entity/Q128007801 db/journals/ijsr/ijsr13.html#LemeHKS21

Eleuda Nuñez Bruno Leme Chun Kwang Tan Hideki Kadone Kenji Suzuki 0002 Masakazu Hirokawa Locomotion Synchronization and Gait Performance While Walking With an Overground Body Weight Support System. 4928-4931 2021 EMBC https://doi.org/10.1109/EMBC46164.2021.9630207 conf/embc/2021 db/conf/embc/embc2021.html#NunezLTKSH21 Chun Kwang Tan Bruno Leme Eleuda Nuñez Hideki Kadone Kenji Suzuki 0002 Masakazu Hirokawa Estimating Range of Lower Body Joint Angles with a Sensorized Overground Body-Weight Support System. 4932-4935 2021 EMBC https://doi.org/10.1109/EMBC46164.2021.9630032 conf/embc/2021 db/conf/embc/embc2021.html#TanLNKSH21 Bruno Leme Chun Kwang Tan Eleuda Nuñez Masakazu Hirokawa Kenji Suzuki 0002 Hideki Kadone A Sensorized Overground Body Weight Support System for Assessing Gait Parameters During Walking Rehabilitation. 4936-4939 2021 EMBC https://doi.org/10.1109/EMBC46164.2021.9630543 conf/embc/2021 db/conf/embc/embc2021.html#LemeTNHSK21 Kazushi Ninomiya Masakazu Hirokawa Kenji Suzuki 0002 Use of Embedding Spaces for Transferring Robot Skills in Diverse Sensor Settings. 547-551 2021 ICMLA https://doi.org/10.1109/ICMLA52953.2021.00091 conf/icmla/2021 db/conf/icmla/icmla2021.html#NinomiyaHS21 Hiroya Kawai Taku Hachisu Masakazu Hirokawa Kenji Suzuki 0002 A Boxed Soft Robot Conveying Emotions by Changing Apparent Stiffness of Its Lid. 577-585 2021 ICSR https://doi.org/10.1007/978-3-030-90525-5_50 conf/socrob/2021 db/conf/socrob/icsr2021.html#KawaiHHS21 Shota Sawada SunKyoung Kim 0001 Masakazu Hirokawa Kenji Suzuki 0002 Effect of Using Embodied Avatars on Turn-taking during Conversational Activities in a Social VR Space. 934-937 2021 TALE https://doi.org/10.1109/TALE52509.2021.9678737 conf/tale/2021 db/conf/tale/tale2021.html#SawadaKH021 Tomoka Ikeda Masakazu Hirokawa Kenji Suzuki 0002 A Multimodal Communication Aid for Persons with Cerebral Palsy Using Head Movement and Speech Recognition. 429-436 2020 ICCHP (2) https://doi.org/10.1007/978-3-030-58805-2_51 conf/icchp/2020-2 db/conf/icchp/icchp2020-2.html#IkedaHS20 Eleuda Nuñez Masakazu Hirokawa Kenji Suzuki 0002 Design of Haptic Gestures for Affective Social Signaling Through a Cushion Interface. 21-26 2020 RO-MAN https://doi.org/10.1109/RO-MAN47096.2020.9223434 conf/ro-man/2020 db/conf/ro-man/ro-man2020.html#NunezH020 Shintaro Kawai Masakazu Hirokawa Naohisa Uesugi Satoru Furugori Toshihiro Hara Kenji Suzuki 0002 Spatial Perception and Operational Behavior of Drivers in Approaching to an Obstacle. 2257-2262 2020 SMC https://doi.org/10.1109/SMC42975.2020.9283332 conf/smc/2020 db/conf/smc/smc2020.html#KawaiHUFHS20 Maxwell Kennard Haihan Zhang Yuki Akimoto Masakazu Hirokawa Kenji Suzuki 0002 Effects of Visual Biofeedback on Competition Performance Using an Immersive Mixed Reality System. 3793-3798 2020 SMC https://doi.org/10.1109/SMC42975.2020.9283022 conf/smc/2020 db/conf/smc/smc2020.html#KennardZAHS20 Shota Sawada Masakazu Hirokawa Kenji Suzuki 0002 Analysis of Behavioral Patterns for Social Virtual Reality Based Active Learning. 914-917 2020 TALE https://doi.org/10.1109/TALE48869.2020.9368359 conf/tale/2020 db/conf/tale/tale2020.html#SawadaH020

Masakazu Hirokawa Atsushi Funahashi Yasushi Itoh Kenji Suzuki 0002 Adaptive Behavior Acquisition of a Robot Based on Affective Feedback and Improvised Teleoperation. 405-413 2019 11 IEEE Trans. Cogn. Dev. Syst. 3 https://doi.org/10.1109/TCDS.2018.2846778 db/journals/tamd/tamd11.html#HirokawaFIS19

Eleuda Nuñez Masakazu Hirokawa Monica Perusquía-Hernández Kenji Suzuki 0002 Effect on Social Connectedness and Stress Levels by Using a Huggable Interface in Remote Communication. 1-7 2019 ACII https://doi.org/10.1109/ACII.2019.8925457 conf/acii/2019 db/conf/acii/acii2019.html#NunezHPS19

Eleuda Nuñez Soichiro Matsuda Masakazu Hirokawa Junichi Yamamoto Kenji Suzuki 0002 Effect of Sensory Feedback on Turn-Taking Using Paired Devices for Children with ASD. 61 2018 2 Multimodal Technol. Interact. 4 https://doi.org/10.3390/mti2040061 https://www.wikidata.org/entity/Q129206219 db/journals/mti/mti2.html#NunezMHYS18

SunKyoung Kim 0001 Masakazu Hirokawa Soichiro Matsuda Atsushi Funahashi Kenji Suzuki 0002 Smiles of Children with ASD May Facilitate Helping Behaviors to the Robot. 55-64 2018 ICSR https://doi.org/10.1007/978-3-030-05204-1_6 conf/socrob/2018 db/conf/socrob/icsr2018.html#KimHMFS18 Chiara Piezzo Bruno Leme Masakazu Hirokawa Kenji Suzuki 0002 Gait measurement by a mobile humanoid robot as a walking trainer. 1084-1089 2017 RO-MAN https://doi.org/10.1109/ROMAN.2017.8172438 conf/ro-man/2017 db/conf/ro-man/ro-man2017.html#PiezzoLHS17 Eleuda Nuñez Masakazu Hirokawa Hiroya Igarashi Kenji Suzuki 0002 Robotic Device to Mediate Human-Human Hug-Driven Remote Communication. 198-208 2017 ICSR https://doi.org/10.1007/978-3-319-70022-9_20 conf/socrob/2017 db/conf/socrob/icsr2017.html#NunezHIS17 Bruno Leme Chiara Piezzo Masakazu Hirokawa Kenji Suzuki 0002 Design of a Cloud-Based Robotic Platform for Accompanying and Interacting with Humans. 262-271 2017 ICSR https://doi.org/10.1007/978-3-319-70022-9_26 conf/socrob/2017 db/conf/socrob/icsr2017.html#LemePHS17 Floris Erich Masakazu Hirokawa Kenji Suzuki 0002 A Visual Environment for Reactive Robot Programming of Macro-level Behaviors. 577-586 2017 ICSR https://doi.org/10.1007/978-3-319-70022-9_57 conf/socrob/2017 db/conf/socrob/icsr2017.html#ErichHS17 Chiara Piezzo Bruno Leme Masakazu Hirokawa Kenji Suzuki 0002 Robot Compliant Behaviour with Mixed-Initiative Interaction in an Obstacle Avoidance Scenario. 718-727 2017 ICSR https://doi.org/10.1007/978-3-319-70022-9_71 conf/socrob/2017 db/conf/socrob/icsr2017.html#PiezzoLHS17

Floris Erich Masakazu Hirokawa Kenji Suzuki 0002 A Systematic Literature Review of Experiments in Socially Assistive Robotics using Humanoid Robots. 2017 abs/1711.05379 CoRR http://arxiv.org/abs/1711.05379 db/journals/corr/corr1711.html#abs-1711-05379

Eleuda Nuñez Soichiro Matsuda Masakazu Hirokawa Junichi Yamamoto Kenji Suzuki 0002 An approach to facilitate turn-taking behavior with paired devices for children with Autism Spectrum Disorder. 837-842 2016 RO-MAN https://doi.org/10.1109/ROMAN.2016.7745216 conf/ro-man/2016 db/conf/ro-man/ro-man2016.html#NunezMHYS16 Masakazu Hirokawa Atsushi Funahashi Yadong Pan Yasushi Itoh Kenji Suzuki 0002 Design of a robotic agent that measures smile and facing behavior of children with Autism Spectrum Disorder. 843-848 2016 RO-MAN https://doi.org/10.1109/ROMAN.2016.7745217 conf/ro-man/2016 db/conf/ro-man/ro-man2016.html#HirokawaFPIS16 Junya Hirose Masakazu Hirokawa Kenji Suzuki 0002 Gaming Humanoids for Facilitating Social Interaction among People. 267 2015 HRI (Extended Abstracts) https://doi.org/10.1145/2701973.2702090 conf/hri/2015ea db/conf/hri/hri2015ea.html#HiroseHS15 Yadong Pan Masakazu Hirokawa Kenji Suzuki 0002 Measuring K-degree facial interaction between robot and children with autism spectrum disorders. 48-53 2015 RO-MAN https://doi.org/10.1109/ROMAN.2015.7333683 conf/ro-man/2015 db/conf/ro-man/ro-man2015.html#PanHS15 Junya Hirose Masakazu Hirokawa Kenji Suzuki 0002 Gaming humanoid: A humanoid video game player with emotional/encouraging movement and skill level control. 54-59 2015 RO-MAN https://doi.org/10.1109/ROMAN.2015.7333625 conf/ro-man/2015 db/conf/ro-man/ro-man2015.html#HiroseHS15 Eleuda Nuñez Soichiro Matsuda Masakazu Hirokawa Junichi Yamamoto Kenji Suzuki 0002 Paired robotic devices to mediate and represent social behaviors. 722-727 2015 RO-MAN https://doi.org/10.1109/ROMAN.2015.7333669 conf/ro-man/2015 db/conf/ro-man/ro-man2015.html#NunezMHYS15 Eleuda Nuñez Soichiro Matsuda Masakazu Hirokawa Kenji Suzuki 0002 Humanoid Robot Assisted Training for Facial Expressions Recognition Based on Affective Feedback. 492-501 2015 ICSR https://doi.org/10.1007/978-3-319-25554-5_49 conf/socrob/2015 db/conf/socrob/icsr2015.html#NunezMHS15

Masakazu Hirokawa Naohisa Uesugi Satoru Furugori Tomoko Kitagawa Kenji Suzuki 0002 Effect of Haptic Assistance on Learning Vehicle Reverse Parking Skills. 334-344 2014 7 IEEE Trans. Haptics 3 https://doi.org/10.1109/TOH.2014.2309135 http://doi.ieeecomputersociety.org/10.1109/TOH.2014.2309135 https://www.wikidata.org/entity/Q50049946 db/journals/toh/toh7.html#HirokawaUFKS14

Masakazu Hirokawa Atsushi Funahashi Yasushi Itoh Kenji Suzuki 0002 A doll-type interface for real-time humanoid teleoperation in robot-assisted activity. 174-175 2014 HRI https://doi.org/10.1145/2559636.2563680 https://ieeexplore.ieee.org/document/8542621 conf/hri/2014 db/conf/hri/hri2014.html#HirokawaFIS14 Junya Hirose Masakazu Hirokawa Kenji Suzuki 0002 Robotic gaming companion to facilitate social interaction among children. 63-68 2014 RO-MAN https://doi.org/10.1109/ROMAN.2014.6926231 conf/ro-man/2014 db/conf/ro-man/ro-man2014.html#HiroseHS14 Masakazu Hirokawa Atsushi Funahashi Yasushi Itoh Kenji Suzuki 0002 Design of affective robot-assisted activity for children with autism spectrum disorders. 365-370 2014 RO-MAN https://doi.org/10.1109/ROMAN.2014.6926280 conf/ro-man/2014 db/conf/ro-man/ro-man2014.html#HirokawaFIS14 Masakazu Hirokawa Naohisa Uesugi Satoru Furugori Tomoko Kitagawa Kenji Suzuki 0002 A haptic instruction based assisted driving system for training the reverse parking. 3713-3718 2012 ICRA https://doi.org/10.1109/ICRA.2012.6225193 conf/icra/2012 db/conf/icra/icra2012.html#HirokawaUFKS12 Masakazu Hirokawa Kenji Suzuki 0002 Coaching to Enhance the Online Behavior Learning of a Robotic Agent. 148-157 2010 KES (1) https://doi.org/10.1007/978-3-642-15387-7_19 conf/kes/2010-1 db/conf/kes/kes2010-1.html#HirokawaS10 Yuki Akimoto Keisuke Ando Ioannis Chatzigiannakis Shotaro Doki Keigo Endo Floris Erich Atsushi Funahashi Maki Furue Satoru Furugori Taku Hachisu Yoko Hakuno Toshihiro Hara Modar Hassan Ari Hautasaari Junya Hirose Hiroya Igarashi Tomoka Ikeda Lorenzo Imbesi Bipin Indurkhya Karlos Ishac Kosuke Isobe Takayuki Itoh Yasushi Itoh Hideki Kadone Alicja Kaminska Miyu Kashiyama Hiroya Kawai Shintaro Kawai Maxwell Kennard SunKyoung Kim 0001 Tomoko Kitagawa Kento Koizumi Anna Kolbasa Tymon Kukier Bruno Leme Ririka Masuda Soichiro Matsuda Takashi Matsui Ryuta Matsuno Yasuyo Minagawa-KawaiYasuyo Minagawa Saeka Miyahara Andreina Nunez Morales Yuto Nakajima Kazushi Ninomiya Taiga Noguchi Eleuda Nuñez Yadong Pan Monica Perusquía-Hernández Chiara Piezzo Zuzanna Radosz-Knawa Hayato Saiki Keita Sakuma Kai Sasaki Shota Sawada Kazuki Sekine Kenji Suzuki 0002 Shion Takahashi Kazuma Takaishi Chun Kwang Tan Misako Uchida Naohisa Uesugi Eriko Yamamoto Junichi Yamamoto Seiji Yoshitake Paulina Zguda Haihan Zhang