The Aerodynamics of the Honk: How a Decades-Old Japanese Study on Nose-Blowing Claimed the Ig Nobel Prize

Executive Overview

Science has long interrogated the farthest reaches of the cosmos and the microscopic architecture of the human genome. From mapping the event horizons of black holes to deploying CRISPR-Cas9 gene editing, humanity’s brightest intellects continually strive to unravel the universe’s most complex mysteries. Yet, a distinct breed of researcher chooses to look inward—and downward—examining the mundane, everyday habits that dictate human existence with the same rigorous methodology usually reserved for astrophysics.

To honor these triumphs of curiosity, the annual Ig Nobel Prizes celebrate achievements that first provoke a laugh, and subsequently prompt deep, reflective thought.

At the 36th First Annual Ig Nobel Prize Ceremony—hosted for the first time in Switzerland—the prestigious Prize in Medicine was posthumously awarded to Dr. Tokuji Unno, Professor Emeritus at Asahikawa Medical University, and his co-researcher Dr. Hiroshi Yajima. Their accolade recognizes a remarkably thorough 1977 study titled How to Blow the Nose.

This milestone victory marks the 20th consecutive year that Japanese researchers have secured an Ig Nobel Prize, adding another whimsical yet scientifically airtight feather to the country’s cap of academic ingenuity. While blowing one’s nose is an instinctive, second-nature reflex practiced daily by billions worldwide, Unno and Yajima’s pioneering research exposes a startling truth: most of us have been doing it completely wrong. By employing advanced pneumotachometers, eardrum pressure transducers, and a healthy dose of empirical inquiry, the duo unlocked the hidden fluid dynamics of nasal hygiene, transforming a simple honk into a masterclass in aerodynamic efficiency.

Detailed Chronology: From 1977 Laboratories to the 2026 Swiss Stage

The Genesis of a Nasal Odyssey (1977)

In the mid-1970s, the medical community frequently doled out advice regarding sinus hygiene, much of it rooted in traditional assumptions rather than empirical data. Patients were routinely warned against blowing their noses too hard for fear of driving mucus into the eustachian tubes or rupturing their eardrums. However, Dr. Tokuji Unno and Dr. Hiroshi Yajima found these clinical warnings lacking in precise, quantitative backing.

Driven by an acute scientific desire to understand the mechanics of upper respiratory tract clearance, the duo embarked on a comprehensive study. They sought to map out the exact airflow velocities, pressure differentials, and volumetric outputs generated when a human being clears their nasal passages.

Rather than relying on anecdotal evidence, Unno and Yajima turned their laboratory at Asahikawa Medical University into a makeshift wind tunnel for the human head. They recruited 15 healthy volunteers and equipped them with sophisticated testing apparatuses, including pneumotachometers (precision airflow meters) and eardrum pressure transducers. By recording the real-time physical reactions of the nasal cavity during a blow, the researchers laid down the foundational fluid dynamics of what would decades later be recognized as a world-class scientific breakthrough.

The Passing of the Torch (2022)

Decades elapsed as the 1977 study remained a hidden gem within otolaryngological archives—respected by specialists, yet largely unknown to the general public. Sadly, Dr. Tokuji Unno passed away in 2022, missing the global resurgence of interest in his life’s most uniquely relatable work.

However, academic legacies rarely fade when nurtured by dedicated institutions. Asahikawa Medical University preserved the memory and methodologies of Dr. Unno, ensuring that his groundbreaking contributions to respiratory mechanics would not be lost to time.

The Swiss Stage and the 20th Consecutive Victory (2026)

The 36th First Annual Ig Nobel Prize Ceremony marked a historic geographic departure, moving outside of its traditional home at Harvard University to be hosted in Switzerland. Amidst a glittering display of genuine scientific achievement mixed with eccentric pageantry, the 2026 Ig Nobel Prize in Medicine was formally awarded to Drs. Unno and Yajima.

Accepting the award on behalf of the late Dr. Unno was Dr. Miki Takahara of Asahikawa Medical University, who graciously stepped onto the global stage to receive the honor. The win holds particular cultural and academic significance, marking the 20th consecutive year that Japanese researchers have been recognized by the Ig Nobel committee. From magnetic fields applied to living frogs to the friction coefficients of banana peels, Japanese science continues to demonstrate that no question is too small, too peculiar, or too funny to deserve absolute scientific rigor.

Supporting Context & Metrics: The Aerodynamics of the Honk

To truly appreciate the findings of Unno and Yajima, one must abandon the haphazard approach traditionally brought to a tissue. The human nasal cavity is not a uniform pipe; it is a complex, asymmetric bio-filter susceptible to swelling, mucosal buildup, and structural deviations like a deviated septum. Through their experiments with 15 volunteers, Unno and Yajima decoded the mechanics of effective nasal discharge, categorizing their findings into three core operational pillars:

1. The One-Side Policy

Nasal passages are rarely created equal. Due to the nasal cycle—a physiological phenomenon where the erectile tissue of the nasal mucosa periodically swells and shrinks in alternating nostrils—one nasal passage is almost always more congested than the other at any given moment.

When an individual attempts to blow both nostrils simultaneously, the airflow naturally follows the path of least resistance. This means air escapes freely through the already open, unblocked nostril, leaving the congested side entirely unaddressed.

The Scientific Solution: To successfully clear a blocked nasal passage, one must deliberately occlude (block) the clear or less-congested nostril with a finger or tissue. By forcing all expelled air through a single, narrow channel, the user creates a high-velocity airstream capable of overcoming the surface tension and viscosity of stubborn mucus.

2. The Power Blow

For generations, conventional wisdom cautioned against blowing the nose with too much force, warning of catastrophic middle ear infections or barotrauma. While excessive, unchecked pressure can indeed cause discomfort, Unno and Yajima’s pressure transducers revealed that the airflow dynamics inside the nasal cavity and the mechanical vulnerability of the middle ear are distinct phenomena.

The Scientific Solution: Higher flow velocity directly increases the discharge efficiency of built-up mucus. Modest, timid blows simply do not generate enough kinetic energy to dislodge thick, viscous secretions trapped deep within the turbinates. A vigorous, high-velocity expulsion is required to shear mucus away from the epithelial lining.

3. The Long Blow

Many people commit the cardinal sin of nasal hygiene by executing a series of short, frantic, hyper-pressurized bursts. According to the biometric data gathered by Unno and Yajima, this approach is fundamentally inefficient.

The researchers calculated the precise metrics of an optimal nasal clearance event:

• Average Duration: 1.23 seconds per sustained blow.
• Volumetric Output: 1.34 liters of air per blow.
• Lung Capacity Ratio: This volume equates to approximately one-third of an average human’s vital lung capacity.

The Scientific Solution: To maximize clearance right down into the upper bronchial pathways, individuals should take a moderate, controlled breath in, followed by a sustained, steady, and elongated blow. This prevents turbulent backpressure while maintaining continuous momentum to sweep fluid out of the respiratory tract.

Official Statements & Academic Perspectives

The recognition of How to Blow the Nose has drawn commentary from medical professionals, academics, and institutional representatives worldwide, shedding light on the bridge between everyday bodily functions and evidence-based medicine.

Dr. Miki Takahara, representing Asahikawa Medical University during her acceptance speech at the 2026 ceremony in Switzerland, emphasized the enduring value of foundational curiosity.

"Dr. Unno dedicated his career to understanding the intricacies of the human otolaryngological system," Dr. Takahara noted. "While the title of the 1977 study often brings a smile to people’s faces, the underlying physics of airflow and pressure management are profoundly important to clinical practice. We are deeply honored that the Ig Nobel committee has recognized the depth within what many dismiss as a mundane daily act."

Etienne Leclerc, a specialist in respiratory fluid dynamics unrelated to the original study, weighed in on the mechanical brilliance of the Unno-Yajima findings:

"Fluid mechanics usually get applied to airplane wings or pipe networks in chemical plants. What Unno and Yajima did was apply Navier-Stokes principles to biological conduits lined with viscoelastic fluids. Their ‘One-Side Policy’ and data on vital lung capacity utilization are textbook examples of how simple engineering principles apply directly to human anatomy. It is brilliant science disguised as common sense."

Furthermore, public health advocates have noted that proper nasal hygiene—especially during allergy and cold seasons—can drastically reduce the secondary complications of upper respiratory infections, such as sinusitis, by preventing mucus stagnation.

Future Outlook: The Modern Legacy of Nasal Aerodynamics

As the world processes the 36th Ig Nobel awards, the legacy of Dr. Tokuji Unno and Dr. Hiroshi Yajima stands as a testament to the power of unpretentious scientific inquiry. In an era dominated by high-tech algorithms and multi-billion-dollar particle colliders, the humble 1977 study reminds the global scientific community that our own bodies still harbor unexamined mysteries.

Moving forward, researchers anticipate that the renewed visibility of How to Blow the Nose may inspire a new generation of biomedical engineers to re-examine other neglected daily habits through the lens of modern technology. From the fluid dynamics of sneezing to the optimal mechanics of coughing and throat-clearing, the intersection of human physiology and everyday physics remains a rich, fertile ground for discovery.

For the everyday citizen, the takeaway is both practical and profound. The next time allergy season strikes or a winter cold takes hold, reaching for a tissue no longer needs to be an exercise in guesswork. Armed with the insights of Asahikawa Medical University, individuals can face their congestion with empirical confidence: press one nostril firmly shut, take a measured breath, and execute a long, powerful, and scientifically validated honk.