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A 56-year-old woman with an 8-year history of dysphagia and chest pain received a diagnosis of diffuse esophageal spasm by esophageal high-resolution manometry (HRM). Approximately 2 years of medical therapy was ineffective, and the patient’s symptoms were worsening. Therefore, surgery was considered to be the most optimal treatment for this patient. The right thoracoscopic approach was selected because a long myotomy from the distal to proximal level of the esophagus was needed based on the HRM findings. The operation was performed in the prone position with establishment of pneumothorax. The total length of the myotomy was 16 cm, and the operation was finished within 2 hours. After the operation, the symptoms were considerably improved and no contractions were detected by HRM. The HRM findings before the operation were classified as rapid contractions with normal latency based on the 2012 Chicago classification of esophageal motility. Treatment for patients with rapid esophageal contractions with normal latency has not been previously described; however, treatment for diffuse esophageal spasm was considered to be pertinent to this patient. In conclusion, right thoracoscopic esophageal long myotomy in the prone position with establishment of pneumothorax may be useful when a proximal-level esophagomyotomy is required based on preoperative mapping by HRM.