April 6, 2023
Eisai Co., Ltd.

No. 23-28

EISAI COMPLETES A MAJOR RENOVATION OF TSUKUBA RESEARCH LABORATORIESAS A GLOBAL DRUG DISCOVERY CENTER AIMING FOR
CONNECTING HUMAN AND HUMAN, AND DATA, AND THE WORLD
Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, “Eisai”) today announced the completion of amajor renovation of its Tsukuba Research Laboratories (Ibaraki, Japan), which is a part of strategic
investment to execute Eisai’s medium-term business plan “EWAY Future & Beyond”.
Eisai implements research and development activities under the DHBL (Deep Human Biology Learning)
drug discovery and development system in our efforts to create new drugs based on innovative andefficient next-generation drug discovery concepts. For this purpose, we recognize diseases as Disease
Continuum to redefine their concepts through comprehensive analysis on genomic, pathophysiological andclinical information associated with underlying causes of disease in order to enhance our understandingon human biology by acquiring data leading to next drug discovery with information, such as biomarkers
and imaging data from patients on our drugs. Tsukuba Research Laboratories is positioned as a corefacility in the DHBL drug discovery and development system. This renovation seeks to accelerateknowledge circulation by connecting each researcher with patients, other members within the Laboratories,
other research sites across the world, and external researchers based on our key concept “HumanConnected Laboratories: Laboratories Connecting Human and Human, and Data, and the World.” Total
investment on this major renovation was 8.5 billion yen.
Main Idea of This Major Renovation[Designs to Enhancing Connection with Patients]
In the Eisai Group, all employees around the world use 1% of their total business hours to interact withpatients (socialization) to understand their thoughts and feelings. Accordingly, we have been working on
the initiatives (hhc activities) to lead value creation for patients. To enhance the opportunities for closer
interaction with people outside the company, such as further socialization with patients, at Tsukuba
Research Laboratories, a traffic line from the front gate through the main building lobby to the courtyard isplaced as interactive zone to enable various communications.
[Realizing Connections between Researchers and Data Driven Drug Discovery]
In favor of generating natural communication between researchers across different therapeutic areas on adaily basis, workspaces for biology researchers and data scientists are allocated on the same floor, andlikewise workspaces for chemistry and pharmacokinetics/analytical researchers are placed on nearby
floors to foster new connections and knowledge exchange. Further creative solutions are implemented inlaboratories, including collective arrangement of structural openings and devices. These designs facilitate
data driven drug discovery through knowledge exchange.
[Knowledge Circulation Generated from Links between Buildings]
Corridors linking multiple buildings embodying the concept of Knowledge Circulation are placed. A trafficline named “Knowledge Corridor” enables people to move all around the laboratory, with which researchefficiency and convenience are considerably improved.

[Meeting Rooms Value Connection with the World]
Each meeting room is equipped with an IT environment that allows smooth communication with overseas
offices, as well as systems able to deal with hybrid meeting which dominantly accepted in recent days.
Eisai will accelerate the drug discovery activities under the DHBL drug discovery system in order to fulfill
unmet medical needs, and in our efforts to further contribute to improve the benefits of patients and thepeople in the daily living domain.

Media Inquiries:
Public Relations Department,
Eisai Co., Ltd.
+81-(0)3-3817-5120[Notes to editors]
1. Outline of Tsukuba Research Laboratories
Location: 5-1-3 Tokodai, Tsukuba, Ibaraki
Groundbreaking of the renovation: December 2019
Completion of the renovation: February 2023 (Opening Ceremony: 6 April 2023)
Site area: 86,845.05 m2Building area: 65,110.78 m2
Total investment on the renovation: 8.5 billion yen

An interactive zone for researchers and people outside company (left) and a traffic line named “Knowledge Corridor”(right)A workplace for data scientists