Tennis Player Kaito Uesugi Appointed as Mibro Ambassador; Campaign to Win Autographed Smartwatch Launched

Mibro, a smartwatch brand for which Heart Planet Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Ryoko Mitsuoka) serves as the official distributor in Japan, is pleased to announce the appointment of professional tennis player Kaito Uesugi as its brand ambassador. Starting March 1, 2026, Uesugi will promote the appeal of Mibro products through the official website, social media, and video advertisements. To commemorate his appointment, the company is also holding a campaign where participants can win a Mibro smartwatch autographed by Uesugi. Mibro will support the challenges of Uesugi, who is also passionate about regional revitalization, with its advanced technology, and together we will create new value in sports.

Kaito Uesugi: A Tennis Player Achieving Victories and Committed to Regional Revitalization

Kaito Uesugi (affiliated with Ezaki Glico) is a professional tennis player. Leveraging his 180cm physique, he won consecutive doubles titles at the All Japan Tennis Championships in 2021 and 2022 and has represented Japan multiple times in the Davis Cup, the premier international team event in men's tennis. He also won doubles titles at the Porto Challenger in Portugal in 2023 and the Pune Challenger in India in 2025. He is a top professional who continues to win numerous titles on the world stage.

While building his competitive record, Uesugi is also dedicated to regional revitalization activities, traveling to various locations to share the appeal of tennis and future goals with children. He has inspired many children through rallies and practical training at kids' and junior tennis clinics, as well as through hitting sessions and point-play practice at training camps for junior elite athletes.

Mibro's Wearable Technology Supporting a Professional Tennis Player

Professional tennis player Kaito Uesugi, who continues to make remarkable strides both domestically and internationally, became an ambassador for the smartwatch brand "Mibro" in March 2026.

For Uesugi, who travels around the world for tournaments, daily condition management is essential. Regarding Mibro's wearable technology, Uesugi says it has made his daily adjustments easier, noting that the Mibro smartwatch plays a role in maintaining his performance.

Moving forward, Mibro will continue to strongly support Uesugi as he takes on challenges on the world stage through our innovative technology.

Comment from Uesugi:
"When I am on the road or in the middle of a long training block, fluctuations in my physical condition directly affect my results. Mibro has become a trigger for me to grasp my 'current state,' making it easier to make daily adjustments. By being able to stay conscious of my daily condition with Mibro, it has become easier to think about the balance between training and recovery."

Win a Mibro Smartwatch Autographed by Kaito Uesugi (2 Winners)

To celebrate Uesugi's appointment as ambassador, Mibro is holding an SNS campaign until March 31, 2026, where you can win an autographed smartwatch. To enter, follow the official Mibro and Kaito Uesugi Instagram accounts, comment on the campaign post with your preferred model, and share it to your Stories. We invite you to apply for a chance to win this special device, which carries the passion of a top professional competing on the world stage.

Campaign Post (Instagram):
https://www.instagram.com/p/DWGadUpEkNR/
(Application deadline: Tuesday, March 31, 2026, at 23:59)

About Mibro

Mibro is a smartwatch brand developed by Zhenshi Information Technology, headquartered in Shanghai, China, and is sold in over 170 countries worldwide.

As a key member (*) of the Xiaomi ecosystem, which manufactures smart devices, and having received investment from companies such as NOKIA, NGP Capital, and Morningside Capital, Mibro achieves highly reliable product development and a stable supply system.

The brand entered the Japanese market in January 2024, with Heart Planet Co., Ltd. serving as the official distributor. With a product lineup that includes the "Mibro A3" released in June 2025, the brand is gaining attention in the Japanese market for its high functionality and affordable prices.

Mibro's mission is to improve the convenience of people's lives by connecting freedom and technology.

* The Mibro brand is an independent brand separate from the Xiaomi brand and is not licensed or certified by Xiaomi.

Company Overview: Heart Planet Co., Ltd.
Company Name: Heart Planet Co., Ltd.
Address: Hoshino Building 515, 3-28 Kanda Sakumacho, Chiyoda-ku, Tokyo
Established: April 2023
Capital: 10 million yen
Representative: Ryoko Mitsuoka, Representative Director
Business Activities:
- Official Japanese distributor for "Mibro" smartwatches
- Import and sale of overseas lifestyle and gadget products
- Wholesale and e-commerce sales of domestic and international brands
Official Website: https://dub.sh/mibro-info

About Heart Planet Co., Ltd.
Heart Planet Co., Ltd. operates as the official Japanese distributor for the smartwatch brand "Mibro," handling product imports, sales, e-commerce operations, and wholesale business for domestic and international brands.

Guided by our mission to "connect the world's excellent products with people's lives and deliver 'convenience and excitement' to every day," we aim to be a one-of-a-kind company that "delivers global value smartly," and we strive to provide services from the customer's perspective at all times.

We will continue to carefully deliver products and experiences that create "sparkle" in your daily life.