Nationwide Survey of 121 Clinics: Generative AI-Driven Traffic Surges 31.1% Month-over-Month

Trinius Co., Ltd. (Headquarters: Shinjuku-ku, Tokyo; Representative Director: Yusaku Hosoi; hereinafter 'the Company')'s LLMO division conducted a survey on clinic website traffic via generative AI, based on Google Analytics 4 (hereinafter 'GA4') data from 121 clinics nationwide.

The results of this survey confirmed a significant increase of 31.1% month-over-month in March 2026 for generative AI-driven traffic sessions across all 121 clinics combined, growing at approximately double the pace of the overall session growth rate (+17.0%). Furthermore, some clinics that implemented the Company's LLMO measures saw an 814% month-over-month growth, highlighting a clear differentiation from clinics that have not implemented such measures in terms of acquiring traffic from AI platforms.

Background of the Survey

Since the latter half of 2025, information seeking behavior via generative AI such as ChatGPT, Gemini, Perplexity, Claude, and Copilot has been expanding across various industries.

In the clinic industry as well, there is an increasing number of users asking generative AI about medical institutions and treatment methods, indicating signs that AI-driven traffic is emerging as a new patient acquisition channel.

Since March 2026, the Company has been offering its LLMO countermeasure service 'LLMO prime'. This survey was conducted with the aim of visualizing patient acquisition trends in the AI era using real data and quantitatively verifying the effectiveness of these measures.

Summary

Generative AI-driven traffic in March 2026 totaled 915 sessions across 121 clinics, an increase of 31.1% month-over-month.

Currently expanding at approximately double the pace of the overall session growth rate (+17.0%).

ChatGPT holds about 87% market share, while emerging AIs like Gemini, Perplexity, and Claude surpass ChatGPT in growth rate.

Traffic via ChatGPT is mainly from the maps route (about 35%) and referral route (up 72.7% month-over-month, highest growth rate).

One clinic implementing LLMO measures saw an 814% growth month-over-month and expanded traffic sources from 1 to 4 platforms.

1. Overall Trends in Generative AI Traffic (Based on 121 Clinics)

The aggregated GA4 data from 121 clinics nationwide for February and March 2026 shows the following trends in generative AI-driven traffic:

Metric | Feb 2026 | Mar 2026 | Month-over-month change --- | --- | --- | --- Generative AI traffic sessions (total 121 clinics) | 698 | 915 | +31.1% Monthly average per clinic | 5.8 | 7.6 | +31.1% Overall session growth rate (reference) | | | +17.0%

Although generative AI-driven traffic sessions still represent a small absolute share of about 0.1% of overall sessions, the growth rate is approximately double the overall session increase rate (+17.0%), indicating further expansion in the future.

2. Platform-Specific Composition Ratio and Growth Rate

Bing China (1.9%) and BraveSearch (0.7%), which are search engines, have been excluded from the generative AI platform aggregation.

The results of aggregating AI traffic by platform as of March 2026 confirmed that ChatGPT accounts for about 87% of the total.

Platform | Composition ratio (March) | Month-over-month growth rate --- | --- | --- ChatGPT | approx. 87% | +38.1% Gemini | approx. 7% | +32.7% Perplexity | approx. 2% | +77.8% Claude | approx. 1% | +100.0%

While ChatGPT holds an absolute market share, emerging AIs such as Perplexity (+77.8%) and Claude (+100.0%) significantly outperform ChatGPT in terms of growth rate. This suggests a diversification of AI search is underway.

3. Main Traffic Routes for ChatGPT (Total 123 Clinics, including Company-involved sites)

Route | March sessions | Month-over-month change | Expected traffic pattern --- | --- | --- | --- chatgpt.com / (not set) | 350 | +50.2% | Direct transition from ChatGPT answer screen chatgpt.com / maps | 304 | +20.6% | Via ChatGPT's map search function chatgpt.com / referral | 133 | +72.7% | Reference to links within ChatGPT answers chatgpt.com / organic | 56 | +36.6% | Via ChatGPT search

A notable finding is that the maps route accounts for approximately 35% of ChatGPT traffic. This indicates a high volume of traffic via ChatGPT's map search function, confirming that maintaining Google Business Profile (GBP) information remains crucial in the AI era.