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Researchers showed that the objective state of social isolation was not directly related to loneliness and depressive symptoms; however, the subjective perception of social isolation and loneliness was associated with depressive symptoms. Specifically, the study revealed that the subjective perception of social isolation and loneliness exacerbated depressive symptoms.

Tsukuba, Japan—Both social isolation, defined as the objective state of having few connections with others, and loneliness, which is a subjective negative feeling of being alone, adversely impact the body and mind. In contrast, some individuals can be socially isolated and yet lead healthy lives without experiencing loneliness. However, comprehensive research on the mechanisms through which social isolation or loneliness impacts mental health has been scarce.

In this study, researchers from the University of Tsukuba determined that the objective state of social isolation itself had little association with loneliness or depressive symptoms. Instead, the subjective perception of social isolation and loneliness was correlated with depressive symptoms. Notably, depressive symptoms were intensified by such perception. These findings underscore the importance of focusing on individuals' feelings about their social isolation. Support measures should target individuals' perceptions, thoughts, and feelings rather than solely increasing social connections.

This research group aims to foster a healthy "individualistic" society where individuals can sustain their social life and well-being and lead fulfilling lives even in conditions of social isolation. Understanding how social isolation and loneliness influence depressive symptoms is crucial for developing new strategies to prevent these conditions.

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This research was supported by JST RISTEX "SOLVE for SDGs: Preventing Social Isolation & Loneliness and Creating Diversified Social Networks" Grant Number JPMJRX21K2, Japan.

Original Paper

Title of original paper:

How Do Social Networks, Perception of Social Isolation, and Loneliness Affect Depressive Symptoms among Japanese Adults?

Journal:

PLOS ONE

DOI:

10.1371/journal.pone.0300401

Correspondence

Professor TACHIKAWA Hirokazu
Institute of Medicine, University of Tsukuba

Professor AIBA Miyuki
Faculty of Human Sciences, Toyo Gakuen University

Assistant Professor KUSHIBIKI Natsuho
Graduate School of Health Sciences, Hirosaki University

Related Link

Institute of Medicine