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Paper Abstract and Keywords
Presentation 2026-03-16 10:40
Nostalgia-Evoking System Using Conversational Agents and Image Generation Technology
Mahiro Yokoi, Yutaro Hirao, Monica Perusquia-Hernandez, Hideaki Uchiyama, Kiyoshi Kiyokawa (NAIST) IMQ2025-21 IE2025-98 MVE2025-28
Abstract (in Japanese) (See Japanese page) 
(in English) With advances in large language models and image generation technologies, methods that support introspective processes—recalling personal experiences and organizing them into narratives—are becoming increasingly widespread. This study focuses on nostalgia, an affective experience of longing for the past, and proposes a support system that mitigates both the transcription burden associated with text-based reminiscence and the record-dependence inherent in photographs. Specifically, the system employs non-directive, narrative-centered dialogue to encourage users to concretize events, and generates prompts from dialogue logs to present AI-generated images that do not rely on existing records. In Experiment 1 ($n=40$), we compared photorealistic and anime-style images. No difference was found in the mean level of nostalgia intensity; however, photorealistic images were rated higher in their connection to autobiographical memory and in perceived naturalness. In Experiment 2 ($n=16$), using a $2times2$ within-subjects design that decomposed the effects of the recall method and image presentation, no significant differences were observed in the primary measures. Exploratory results indicated a tendency for higher positive affect in the dialogue condition and lower negative affect when images were presented. Overall, the effects were not uniform, suggesting the importance of presentation strategies that accommodate individual differences and of evaluations grounded in measures of the recollection process.
Keyword (in Japanese) (See Japanese page) 
(in English) Nostalgia / Autobiographical Memory / Conversational AI / Image Generation / Reminiscence Support / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 411, MVE2025-28, pp. 11-16, March 2026.
Paper # MVE2025-28 
Date of Issue 2026-03-09 (IMQ, IE, MVE) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IMQ2025-21 IE2025-98 MVE2025-28

Conference Information
Committee CQ MVE IMQ IE  
Conference Date 2026-03-16 - 2026-03-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-Sangyoushien-Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MVE 
Conference Code 2026-03-CQ-MVE-IMQ-IE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Nostalgia-Evoking System Using Conversational Agents and Image Generation Technology 
Sub Title (in English)  
Keyword(1) Nostalgia  
Keyword(2) Autobiographical Memory  
Keyword(3) Conversational AI  
Keyword(4) Image Generation  
Keyword(5) Reminiscence Support  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Mahiro Yokoi  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Yutaro Hirao  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Monica Perusquia-Hernandez  
3rd Author's Affiliation Nara Institute of Science and Technology (NAIST)
4th Author's Name Hideaki Uchiyama  
4th Author's Affiliation Nara Institute of Science and Technology (NAIST)
5th Author's Name Kiyoshi Kiyokawa  
5th Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Speaker Author-1 
Date Time 2026-03-16 10:40:00 
Presentation Time 20 minutes 
Registration for MVE 
Paper # IMQ2025-21, IE2025-98, MVE2025-28 
Volume (vol) vol.125 
Number (no) no.408(IMQ), no.410(IE), no.411(MVE) 
Page pp.11-16 
#Pages 6 
Date of Issue 2026-03-09 (IMQ, IE, MVE) 

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