He is not an exception. He is part of a growing global pattern.Across cities from London to Seoul, loneliness is emerging as one of the defining social issues of the 21st century one that is quietly reshaping economies, public health systems and the way people relate to one another.

Loneliness is not new. But its scale, experts say, is unprecedented.In recent years, governments and health organisations have begun to treat it as a serious public health concern.

The World Health Organization has warned that social isolation can have effects comparable to smoking and obesity, increasing the risk of heart disease, depression and premature death.

In the UK, more than nine million people report feeling lonely often or always. In Japan, the issue has become so acute that the government appointed a minister for loneliness a role designed to coordinate national responses.

Yet the crisis often remains invisible.“Loneliness doesn’t leave visible scars,” said a social researcher. “But its impact is profound.”

The rise of social media and digital communication was expected to bring people closer together. Instead, for many, it has produced the opposite effect.

Platforms that promise connection can also amplify comparison, exclusion and superficial interaction. Users may accumulate hundreds of online contacts while lacking meaningful relationships offline.

In Seoul, where digital adoption is among the highest in the world, young people report increasing levels of isolation despite constant connectivity.“It feels like everyone is talking,” said one university student, “but no one is really listening.”

Economic and social changes have also contributed to the problem.Urbanisation has drawn millions into large cities, often far from family networks. Flexible labour markets and gig work have reduced stable workplace communities. Remote work, accelerated during the pandemic, has further blurred the boundaries between professional and personal life.

In London, surveys suggest that young professionals despite being surrounded by people are among the most likely to report feeling lonely.

The traditional structures that once fostered connection extended families, neighbourhood networks, long-term employment have weakened.

As loneliness grows, so too does a new kind of market: the “loneliness economy”.

In Japan, companies offer services ranging from rented companions to staged social interactions. Customers can hire someone to share a meal, attend an event or simply listen.

Elsewhere, technology firms are developing AI-driven chatbots designed to simulate emotional support. These tools are marketed as accessible, judgment-free alternatives to human interaction.

Critics, however, warn that such solutions may deepen the problem rather than solve it.

“You cannot outsource human connection indefinitely,” said a behavioural psychologist. “At some point, the absence of real relationships becomes more acute.”

The effects of loneliness are increasingly visible in healthcare.

Doctors report patients presenting with symptoms that are as much social as medical anxiety, insomnia, chronic stress. In some cases, loneliness is identified as a contributing factor to physical illness.

Health services in several countries have begun experimenting with “social prescribing”, where patients are referred not just to medication but to community activities, support groups or volunteering opportunities.

The approach reflects a growing recognition that well-being is shaped by social as well as biological factors.

While loneliness can affect anyone, certain groups are particularly vulnerable.Older adults living alone often face shrinking social circles. Young people, navigating transitions in education and employment, may struggle to build stable relationships.

Migrants and urban newcomers can find themselves disconnected from familiar support systems.Even within families, changing dynamics have altered patterns of interaction.

Smaller household sizes and increased mobility mean fewer daily opportunities for shared experiences.

Addressing loneliness requires more than individual effort.Urban planners are beginning to design spaces that encourage interaction parks, community centres and shared public areas. Some cities are experimenting with co-housing models, where residents share facilities while maintaining private living spaces.

Educational institutions and workplaces are also being urged to prioritise social connection, recognising its role in productivity and mental health.But progress is uneven, and the scale of the challenge remains significant.

At its core, the loneliness crisis reflects a fundamental truth: human beings are social creatures.The need for connection is not optional. It is essential.

As societies continue to evolve technologically, economically and culturally the question is whether they can preserve the conditions that allow meaningful relationships to flourish.

For the man in Tokyo, and millions like him, that question is not abstract.It is lived, daily, in the quiet spaces between notifications.

A 2023 survey by the Mental Health Foundation found that roughly one in five people in the United Kingdom report feeling anxious most or all of the time. The pressure appears especially acute among younger populations.

In 2024 alone, about 500 children a day were referred for anxiety-related treatment through the National Health Service in England, underscoring the growing scale of the challenge facing health systems and families.

Mental health specialists say the phenomenon reflects the psychological consequences of living in an era marked by constant information flows, social pressures and economic insecurity.

Anxiety as a survival mechanism; According to psychotherapist Owen O’Kane, anxiety itself is not inherently harmful. It forms part of the body’s natural “fight, flight or freeze” response an evolutionary mechanism designed to protect people from danger.

However, he says the problem arises when the brain remains locked in a permanent state of alertness. In that situation, the mind interprets everyday uncertainty as a potential threat, leaving individuals constantly tense and hyper-vigilant.

Psychologists describe anxiety as closely linked to uncertainty. In a rapidly changing world, people often struggle to tolerate unpredictability, leading their minds to imagine worst-case scenarios as a form of psychological preparation.

Counselling psychologist and broadcaster Sian Williams says this process can sometimes be beneficial. Anticipating potential risks can help people plan ahead. But when the brain fills informational gaps with imagined catastrophes, anxiety can spiral into a persistent and unhelpful mental state.

Experts increasingly emphasize that trying to suppress or avoid anxious feelings may intensify them. Instead, they argue that learning to understand and manage anxiety can allow people to use it as a signal rather than a controlling force.

Childhood: learning resilience early;

Anxiety frequently emerges during childhood, especially during periods of change such as starting school or adjusting to new environments.

Clinical psychologist Meredith Elkins, who specializes in childhood anxiety at Harvard Medical School’s McLean Hospital, says parents should avoid treating anxiety as a character flaw.She explains that temporary fears are a normal part of development.

The key is to acknowledge children’s emotions while encouraging them to continue participating in daily activities.Parents sometimes attempt to shield children from situations that cause anxiety, but experts warn that constant avoidance may reinforce fear rather than reduce it.

Exposure to manageable challenges helps young people build coping skills and resilience.Specialists recommend watching for three warning signs that anxiety may require professional attention: when it significantly interferes with daily activities, when emotional distress appears disproportionate to the situation, and when symptoms persist for weeks or months.

There is also a strong relationship between anxiety and neurodiversity. Children with sensory sensitivities or conditions affecting attention and processing may experience anxiety differently. In such cases, clinicians often adjust treatment strategies for example, modifying environments or introducing tools such as noise-reducing headphones to help children gradually participate in social settings.

Adolescence: identity and emotional turbulence;

For many teenagers, anxiety intensifies during adolescence, a period marked by identity formation, academic pressures and social comparison.

Psychologists say a key challenge is preventing young people from seeing anxiety as a defining personal trait rather than a temporary emotional state.Open conversations about emotions can help normalize the experience.

When parents share their own fears and how they cope with them, teenagers may feel more comfortable discussing their worries.Encouraging adolescents to identify the underlying fear behind their anxiety can also make challenges feel more manageable.

Concerns about exams, social rejection or family conflict often appear overwhelming until they are examined more closely.Another growing concern among specialists is the influence of social media. Many parents struggle to monitor how online content shapes teenagers’ self-perception and emotional well-being.

Psychologists say excessive exposure to comparison, criticism or distressing news can amplify feelings of insecurity.For some families, setting boundaries around social media use becomes necessary when online interactions significantly increase emotional distress.

Early adulthood: uncertainty and social pressures;

Young adulthood presents a new set of pressures that can intensify anxiety.Clinical psychologist Lauren Cook notes that younger generations have grown up immersed in a constant stream of news and digital information.

Human brains, she says, were not designed to process large volumes of negative global developments in real time.Economic uncertainty adds further strain. Rising housing costs and unstable employment prospects often force young adults to relocate or delay long-term plans.Lifestyle factors can also play a role.

Poor sleep, excessive alcohol consumption and unhealthy diets may increase stress and inflammation in the body, which research increasingly links to mental health conditions.

Experts advise relatively simple habits to help counter these effects. Regular physical movement, exposure to sunlight and mindful activities such as meditation or yoga can reduce the intensity of anxious thoughts.Social connection is equally important. Younger generations are often described as among the loneliest, despite being the most digitally connected.

Psychologists encourage individuals to actively initiate real-world interactions meeting friends for coffee, joining community groups or simply having conversations without phones nearby.

Later life: anxiety and loss: Anxiety does not disappear with age. In some cases it intensifies as people confront health challenges, bereavement or declining independence.

Psychiatrist Cornelius Katona notes that anxiety among older adults is frequently under-recognized. Cultural attitudes toward discussing mental health can discourage individuals from seeking support.Psychological therapies are often effective in addressing anxiety in later life.

Clinicians say medication alone may not always be the most appropriate approach, particularly when emotional distress stems from life transitions rather than chemical imbalance.Supporting older individuals may involve reconnecting them with activities that once brought them purpose or joy.

Rejoining social groups, engaging in hobbies or volunteering can help rebuild confidence and reduce isolation.Grief is another factor that commonly fuels anxiety in older adulthood.

Psychotherapist Julia Samuel explains that loss can trigger feelings of vulnerability and fear about the future. Activities such as journaling, music and movement may help people process grief while reconnecting with positive experiences.

Learning to live with uncertainty; Mental health professionals increasingly agree that anxiety cannot be completely eliminated from human life. Instead, the challenge lies in developing healthier relationships with it.

Across all stages of life, experts emphasize the importance of acknowledging anxious thoughts without allowing them to dictate behaviour. Therapy, supportive relationships and practical coping strategies can help individuals regain a sense of safety and control.

In a world characterized by rapid change and uncertainty, anxiety may remain a persistent feature of modern life.

But psychologists say understanding how it functions and learning to respond to it constructively can prevent fear from dominating everyday experience.