Taxi Media 'TOKYO PRIME' Begins Content Partnership with MyBest, Operator of Product Comparison Service 'MyBest'

IRIS Inc. (Headquarters: Minato-ku, Tokyo; Representative Directors: Takuya Mai and Teppei Toda; hereinafter IRIS), which operates Japan's largest (*) taxi media 'TOKYO PRIME', is pleased to announce that MyBest Inc. (Headquarters: Chuo-ku, Tokyo; Representative Director and CEO: Toru Yoshikawa; hereinafter MyBest), which operates the product comparison service 'MyBest', has become a new sponsored content partner for 'TOKYO PRIME'.

MyBest's belief in realizing the 'best choice experience' and enriching users' lives aligns with IRIS's desire to 'transform taxi travel time into a valuable information experience', leading to this sponsored content partnership.

Through this collaboration, product introduction content leveraging MyBest's thorough verification expertise will be broadcast on the taxi media 'TOKYO PRIME', and a new 'sponsored advertising menu' combining MyBest's objective verification and TOKYO PRIME's reach will be offered to advertisers.

■ Background of the Initiative

In recent years, corporate marketing activities have increasingly emphasized not only 'broad awareness acquisition' through traditional advertising but also 'deep understanding of product true value (fostering customer understanding)' during the comparison and consideration phase leading to purchase.

Especially in categories with diverse options such as home appliances, gadgets, cosmetics, and daily necessities, there is a demand for 'objective and highly reliable decision-making materials' beyond mere image advertising.

However, long-form content summarizing detailed verification results tends to be less actively viewed. By utilizing taxi media, which is a private travel space with extremely high screen attention, this initiative creates opportunities for natural and deep information exposure on the daily life path.

The product comparison service 'MyBest' is a top-class domestic product comparison service that thoroughly tests products across all genres and proposes the best options to users.

Meanwhile, 'TOKYO PRIME' developed by IRIS has provided '18 minutes to encounter unseen PRIME' to many passengers including business professionals.

Through this partnership, by leveraging MyBest's thorough product verification data and TOKYO PRIME's media contact power in private spaces, we will support consumers' purchasing decisions and strongly foster customer understanding.

■ Strengths of the New 'MyBest Sponsored Menu' and Benefits for Advertisers

Along with this partnership, we are launching a new 'MyBest Sponsored Advertising Menu' for advertisers.

Reliability guaranteed by MyBest's overwhelming verification expertise

Content is created based on objective data verified from multiple angles by specialized equipment and personnel (e.g., sound quality, suction power, usability), allowing advertisers to appeal product appeal with overwhelming persuasiveness.

Significant cost optimization from creative production to broadcasting

By utilizing the sponsored menu, advertisers can significantly reduce costs of producing promotional videos from scratch. They can broadcast based on high-quality verification videos produced by MyBest, enabling cheaper and more efficient implementation.

'High attention × High reach' unique to taxi media

Broadcast as a content slot on 'TOKYO PRIME', it naturally appeals to passengers as useful information during travel. With deep attention born from the private space, high-quality reach expansion can be expected.

Latest media kit

■ Partnership Overview

Partnership content: ① Broadcasting useful information based on MyBest's knowledge and verification results
　　　　　 ② Deployment of sponsored content on taxi media 'TOKYO PRIME' and start of sales of 'MyBest Sponsored Menu' for advertisers

Broadcasting target: Taxi media 'TOKYO PRIME'

Partnership start date: Broadcasting starts from Monday, June 8, 2026

■ MyBest Inc.
With the mission 'Realize the best choice experience using the Internet', MyBest develops and operates 'MyBest', one of Japan's largest product comparison services used by over 30 million monthly unique users. Currently, it has expanded to 8 countries and regions outside Japan, aiming to realize the best choice experience and change the world.

Representative Director and CEO: Toru Yoshikawa

Location: Sumitomo Fudosan Tsukiji Building, 7-17-1 Tsukiji, Chuo-ku, Tokyo

Corporate website: https://my-best.com/company/

[Contact for this matter]

MyBest Inc. Media Division PR & Communications, Iwata

Email: press@my-best.com

■ About TOKYO PRIME (https://www.tokyo-prime.jp/)

'TOKYO PRIME', operated by IRIS Inc., is Japan's largest (*) taxi media broadcast on rear-seat tablets installed in taxis mainly called via the 'GO' app. Since April 2026, the number of signage units has expanded to 71,000 (25,500 in Tokyo), covering 36 prefectures nationwide. With the concept '18 minutes to encounter unseen PRIME', it delivers content condensed with 'PRIME serendipity'—special things, events, and information only encountered by taxi passengers.

* Based on comparison of unit numbers in media kits of taxi media companies. As of June 2026