Bias in Medical Institution Displays via AI Search Revealed in 100-Clinic Survey in Nagoya: Information Concentrates on Specific Clinics
Admedical Inc. surveyed 100 clinics in Nagoya and found that AI searches tend to show only a limited number of specific medical institutions (about 20-30%). This highlights issues with AI search visibility.
📋 Article Processing Timeline
- 📰 Published: April 8, 2026 at 04:27
- 🔍 Collected: April 7, 2026 at 20:00
- 🤖 AI Analyzed: April 20, 2026 at 21:12 (313h 12m after Collected)
The year 2026 is being called the 'First Year of AI Search,' and search behavior is undergoing a major shift. Instead of comparing multiple sites via traditional keyword searches, a behavior is spreading where people consult AI and make decisions based on its answers.
In response to this change, Admedical Inc. (Headquarters: Nakamura-ku, Nagoya) conducted a survey on the actual display status in AI searches targeting 100 clinics in Nagoya city.
As a result, it was confirmed that in AI searches, many medical institutions are not displayed equally; rather, there is a tendency for information to concentrate on specific medical institutions.
## Background | The First Year of AI Search and Challenges for Medical Institutions
In recent years, with the spread of generative AI, the way patients search for medical institutions has changed significantly.
For example,
'I have a headache, should I go to a hospital?'
'Please tell me about internal medicine clinics nearby'
Cases where patients consult AI directly in this manner and decide where to visit based on the answers are increasing.
Going forward, with the spread of voice search, this trend is expected to accelerate further.
In such AI searches, because the medical institutions presented are limited, how information is recognized by AI has become a crucial factor.
## Survey Overview
Survey target: 100 clinics in Nagoya city
Extraction method: Extracted based on Google Maps, etc.
AI used: ChatGPT, Gemini, Perplexity
Question asked: 'Please tell me 5 recommended internal medicine clinics in Nagoya city'
Number of executions: Conducted multiple times for each AI
## Survey Results | AI Repeatedly Presents 'Limited Medical Institutions'
As a result of the survey, while a certain number of medical institutions were mentioned by each individual AI, a tendency was confirmed where the exact same medical institutions were presented repeatedly.
Furthermore, when analyzed across multiple AIs, the mentioned medical institutions were concentrated in a specific segment, showing a tendency to remain at only about 20-30% of the total.
- Each individual AI mentions a certain number of medical institutions
- The same medical institutions are displayed repeatedly
- Across multiple AIs, mentioned medical institutions are concentrated in a specific segment
In other words, in AI search, not all medical institutions are displayed equally,
In response to this change, Admedical Inc. (Headquarters: Nakamura-ku, Nagoya) conducted a survey on the actual display status in AI searches targeting 100 clinics in Nagoya city.
As a result, it was confirmed that in AI searches, many medical institutions are not displayed equally; rather, there is a tendency for information to concentrate on specific medical institutions.
## Background | The First Year of AI Search and Challenges for Medical Institutions
In recent years, with the spread of generative AI, the way patients search for medical institutions has changed significantly.
For example,
'I have a headache, should I go to a hospital?'
'Please tell me about internal medicine clinics nearby'
Cases where patients consult AI directly in this manner and decide where to visit based on the answers are increasing.
Going forward, with the spread of voice search, this trend is expected to accelerate further.
In such AI searches, because the medical institutions presented are limited, how information is recognized by AI has become a crucial factor.
## Survey Overview
Survey target: 100 clinics in Nagoya city
Extraction method: Extracted based on Google Maps, etc.
AI used: ChatGPT, Gemini, Perplexity
Question asked: 'Please tell me 5 recommended internal medicine clinics in Nagoya city'
Number of executions: Conducted multiple times for each AI
## Survey Results | AI Repeatedly Presents 'Limited Medical Institutions'
As a result of the survey, while a certain number of medical institutions were mentioned by each individual AI, a tendency was confirmed where the exact same medical institutions were presented repeatedly.
Furthermore, when analyzed across multiple AIs, the mentioned medical institutions were concentrated in a specific segment, showing a tendency to remain at only about 20-30% of the total.
- Each individual AI mentions a certain number of medical institutions
- The same medical institutions are displayed repeatedly
- Across multiple AIs, mentioned medical institutions are concentrated in a specific segment
In other words, in AI search, not all medical institutions are displayed equally,