Aucnet Circular Economy Lab Publishes 'Used Car Market Price Index' for April 2026
The Aucnet Circular Economy Lab has released the 'Used Car Market Price Index' for April 2026. Jointly developed with UTEcon, this index overcomes the limitations of average transaction prices to objectively visualize market realities. In April, the index stood at 2.478, a 3.57% decrease from the previous month.
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- 📰 Published: May 20, 2026 at 19:30
- 🔍 Collected: May 20, 2026 at 11:01
- 🤖 AI Analyzed: May 21, 2026 at 17:57 (30h 55m after Collected)
The Aucnet Circular Economy Lab, a corporate lab established by Aucnet Inc. (HQ: Minato-ku, Tokyo; CEO: Shinichiro Fujisaki), has published its 'Used Car Market Price Index' report for April 2026.
In Japan, 'average transaction price' is often cited to understand market trends. However, this metric alone fails to reflect changes in the quality of used cars, making it insufficient for accurately grasping market price fluctuations.
To address this, Aucnet developed the 'Reuse Circulation Price Index' in collaboration with The University of Tokyo Economic Consulting Inc. (UTEcon). As its first iteration, they utilized Aucnet’s member circulation data, which exceeds 500,000 vehicles annually, and UTEcon's expertise in building price indices. By incorporating various vehicle attributes into a statistical model, they created a system that objectively measures price fluctuations, issuing monthly reports since December 2023.
The 'Used Car Market Price Index' for April 2026 is 2.478 (base: July 2008 = 1), a decrease of 0.092 (3.57%) from the previous month's 2.570. Conversely, the 'average transaction price' index stands at 1.558 this month (base: July 2008 = 1), an increase of 0.013 (0.81%) from the previous month's 1.545. The actual average transaction prices were 955,090 JPY in March 2026 and 962,849 JPY in April 2026.
The divergence between the index and the average transaction price suggests that while market prices are declining due to reduced demand, the share of higher-quality vehicles in circulation is increasing. By body type, the index saw a broad decline across all categories, led by a 6.32% drop in compact cars, including SUVs and minivans.
In Japan, 'average transaction price' is often cited to understand market trends. However, this metric alone fails to reflect changes in the quality of used cars, making it insufficient for accurately grasping market price fluctuations.
To address this, Aucnet developed the 'Reuse Circulation Price Index' in collaboration with The University of Tokyo Economic Consulting Inc. (UTEcon). As its first iteration, they utilized Aucnet’s member circulation data, which exceeds 500,000 vehicles annually, and UTEcon's expertise in building price indices. By incorporating various vehicle attributes into a statistical model, they created a system that objectively measures price fluctuations, issuing monthly reports since December 2023.
The 'Used Car Market Price Index' for April 2026 is 2.478 (base: July 2008 = 1), a decrease of 0.092 (3.57%) from the previous month's 2.570. Conversely, the 'average transaction price' index stands at 1.558 this month (base: July 2008 = 1), an increase of 0.013 (0.81%) from the previous month's 1.545. The actual average transaction prices were 955,090 JPY in March 2026 and 962,849 JPY in April 2026.
The divergence between the index and the average transaction price suggests that while market prices are declining due to reduced demand, the share of higher-quality vehicles in circulation is increasing. By body type, the index saw a broad decline across all categories, led by a 6.32% drop in compact cars, including SUVs and minivans.
FAQ
Why use an index instead of just the average transaction price?
Average transaction prices do not reflect changes in the 'quality' of cars traded, making it impossible to accurately grasp pure price fluctuations. The index corrects for quality using statistical models.
What does the collaboration with UTEcon mean?
It means that the index leverages high-level economic and econometric expertise from University of Tokyo experts to ensure objectivity and academic credibility.
What is the primary reason for the decline in the index?
The report identifies a decrease in demand as the primary factor, reflecting a downward trend in market prices.