Eisai Announces Acquisition of Arteryex Shares (Making Arteryex a Subsidiary) to Strengthen and Rapidly Expand the Foundation of its Digital Solution Business

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, “Eisai”) announced today that Eisai has acquired a majority of the shares issued by Arteryex Inc. (Headquarters: Tokyo, CEO: Li Dongying, “Arteryex”), a company that plans and develops software related to digital solutions such as provision of medical information platforms, through purchase of shares and subscription of a third-party allocation of common shares, and made it a subsidiary, as of March 31, 2022. The two companies will work together to develop and provide PHR (Personal Health Record)-related services for patients, healthcare professionals and society at large.


Eisai launched its medium-term business plan “EWAY Future & Beyond” in April 2021, where the perspective to be shifted from that of patients to The People or each consumer. With “empowering The People to realize their fullest life” as the vision, Eisai delivers not only pharmaceutical products but also solutions to The People, by utilizing the latest digital technology such as AI, and aims to remove the anxiety of The People.

Arteryex has excellent software development capabilities and has developed its own PHR-related product services, including apps for storing and converting health-related information of patients undergoing treatment and a wide range of users into data, as well as apps for companies for employee health management.


Eisai aims to strengthen and rapidly expand its digital solution business base by acquiring Arteryex's development capabilities and quality PHR products through the subsidiary acquisition. In addition to reaching a new customer segment of existing products, Eisai will promote developing products including new applications by utilizing Arteryex’s input technology and systems used in image data. Furthermore, Eisai will advance the utilization of data acquired through PHR-related products, as the entire Eisai Group, leveraging the data management know-how that Eisai has practiced in its medicine creation activities and disease awareness activities.

For building the Eisai Universal Platform (EUP), through those initiatives, Eisai will enhance creating a packaged solution, as well as strengthen its delivery infrastructure, for maintenance and improvement of health, prevention and disease awareness, and will expand its contribution to The People.


The current management team of Arteryex will remain after the conversion to a subsidiary. The acquisition by Eisai of Arteryex as a subsidiary will not have a material impact on the consolidated financial results of Arteryex.


Media Inquiries:

Public Relations Department,

Eisai Co., Ltd.




[Notes to editors]

1. About Arteryex Inc.

Arteryex is a software planning and development company specializing in systems and application software in the medical and healthcare fields. In the era of 100 years of life, it is becoming increasingly important for people to stay healthy. On the other hand, the data needed to advance medical care is fragmented and dispersed in various fields. The company’s goal is to better understand the needs of each individual and to achieve optimal health care and medical treatment for each person with combining the latest technologies, such as blockchain and AI, to maximize the use of data that is currently underutilized.


Outline of Arteryex

Company Name: Arteryex Inc.
Location: 1-4-4, Iwamoto-cyo, Chiyoda-ku, Tokyo, Japan
Representative: Li Dongying
Principal Businesses:  Software planning and development
Capital: 32 million yen
Foundation: March, 2018
Number of Employees:  19

For more information about Arteryex, please visit https://arteryex.biz/


2. About PHR products owned by Arteryex

■  Click-Karte

“Click-Karte” is a smartphone application for general consumers that automatically converts information, such as the items listed in the medication handbook and the results of blood tests and/or medical examinations, into data by photographing them with a smartphone and uploading to the system. After launching in November 2020, the app has had more than 20,000 downloads at this point. This may contribute to simplification of data input in apps to be developed by Eisai in the future.


■  with LEAF

“with LEAF” is a smartphone application developed for companies to manage employee health internally with the goal of promoting employee health and improving company productivity. The app is designed not only to contribute to promoting employees’ habitual exercise with application-based activities that encourage employees to practice exercise by setting the number of steps and walking distance, but also to raise awareness of employees for their health and exercise status by recording the number of steps taken, distance walked, and calories burned on a daily basis. It also has a chat function for individuals and groups, which can be used to stimulate communication among employees.


■  Sasaeru Note

“Sasaeru Note” is a system that links a smartphone application for patients with a viewing system exclusively for healthcare professionals, enabling medical personnel to capture the health status reported by patients while in the home environment. It allows patients and their families to review records of the occurrence of adverse reactions to medications, as well as enables to prevent patients and their families from unintentionally forget to report about a patient’s daily records and health status when they share the information with healthcare professionals.