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Otorhinolaryngology and Head and Neck Surgery

Otorhinolaryngology and Head and Neck Surgery provides diagnoses and treatments for disorders of ears, nose, throat and neck in patients of all ages, including both medical and surgical patients. An emphasis is placed on an individual patient-oriented approach, providing detailed explanations and meeting patient needs.

Medical services

Approximately 30 physicians provide general outpatient services in the morning and specialized outpatient services in the afternoon three days per week. An appointment is required for consultation. More than 800 cases of surgeries for ear, nose, voice and swallowing disorders, and neck and head tumors are performed annually.

Diagnosis and treatment policy

Both at general and specialized outpatient clinics, professors, associate professors, lecturers, assistant professors, young medical staff, and interns discuss individual cases to determine treatment plans. High quality and holistic care is provided.


Hearing impairment

: In patients from infants to adults. Surgery for middle ear disorders, instructions regarding the use and care for a hearing aids for perceptive deafness, cochlear implant surgery.


Detailed examination, diagnosis, rehabilitation, medical therapy

Head and neck cancer

A combination of chemotherapy, radiotherapy, and surgical therapy is used so as to conserve function

Voice and swallowing disorders

From surgery to rehabilitation

Facial paralysis

Diagnosis and surgery

Chronic sinusitis

Examination, diagnosis, surgery

Target diseases

Sudden hearing loss, low-tone sensorineural hearing loss, Meniere’s disease, acoustic tumors, age-related hearing loss, hereditary deafness, otosclerosis, chronic otitis media, aural atresia, microtia, central hearing loss, allergic rhinitis, chronic sinusitis, postoperative paranasal sinus cysts, nasal and paranasal sinus tumors, ear and temporal bone tumors, lingual cancer, pharyngeal cancer, laryngeal cancer, thyroid tumor, salivary gland tumors in the parotid and submaxillary glands, Bell’s palsy, benign paroxysmal postural vertigo (BPPV), vestibular neuronitis, dysphonia, dysphagia

Advanced treatments/ Specialized treatments

  • Cochlear implant surgery
  • Artificial auditory brain stem implant surgery
  • Skull base surgery
  • Navigation surgery

Frequently performed tests

  • Standard pure-tone audiometry, standard speech audiometry, conditioned orientation response (COR) audiometry, and ABR are performed in combination with a computer program for patients ranging in age from babies to the elderly.
  • ENG (electronystagmogran): Eye-movement tests in patients with dizziness
  • Ultrasound examination: Examination for tumors
  • Olfactory and gustatory tests: Tests for smell and taste sensation
  • Phonetic function test: Computer evaluation of abnormal voice
Tatsuya Yamasoba

Tatsuya Yamasoba


Otorhinolaryngology and Auditory and Voice Surgery


M.D. , Ph.D.


Otology, Audiology, Neurotology

Research Interests

Cochlear implant, hearing loss, regeneration, anti-aging


Japanese, English

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Major diseases and number of new patients treated in this department

Disease name Number of new patients
1 Chronic otitis media and otitis media involving cholesteatoma 70
2 Pediatric hearing loss 100
3 Facial nerve paralysis 112
4 Chronic sinusitis 70
5 Laryngeal cancer 39
6 Hypopharyngeal cancer 42
7 Oral cavity and oropharyngeal cancer 40
8 Vocal cord polyps and nodules 14


Areas of expertise, treatment and examination methods

  1. Chronic otitis media and otitis media involving cholesteatoma
  2. Congenital hearing loss
  3. External auditory canal atresia
  4. Chronic sinusitis
  5. Olfactory disorders
  6. Oral cavity and pharyngeal cancer
  7. Vocal cord paralysis
  8. Dysphagia
Treatment methods
  1. Tympanoplasty
  2. Cochlear implant surgery
  3. External auditory canal plasty with the perforator flaps
  4. Endoscopic sinus surgery (navigation)
  5. Transoral partial laryngopharyngectomy
  6. Reconstruction with the free muscle flaps
  7. Combined chemoradiation therapy
  8. Surgical procedures for voice restoration
  9. Swallowing surgery
Examination methods
  1. ABR
  2. Pediatric hearing loss assessment
  3. Facial nerve examination
  4. Balance function test
  5. Narrow band imaging (NBI)
  6. Swallowing function assessment
  7. Swallowing reflex test

Numbers of major surgeries performed in this department

Name of surgery Number
1 Tympanoplasty 94
2 Cochlear implant surgery 44
3 Stapes surgery 10
4 Endoscopic sinus surgery 111
5 Surgery for oral cavity, oropharyngeal, hypopharyngeal and laryngeal cancer 71
6 Surgery for tumot of paranasal sinus 15
7 Parotid and submandibular gland surgery 36
8 Laryngomicrosurgery 70
9 Arytenoid adduction surgery and thyroplasty 14
10 Swallowing surgery 27


Numbers of major examinations conducted in this department

Name of examination Number
1 Standard pure-tone audiometry 4,833
2 Standard speech audiometry 830
3 Conditioned orientation reflex (COR) audiometry 756
4 Tympanometry and stapes reflex measurement 870
5 ABR, DPOAE, and SOAE 562
6 ENG 275
7 Videofluorography (esophagography) for swallowing 752


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