Eisai Co., Ltd. — Capital/Financing Update 2026

Jun 4, 2026

FASF

MEMBERSHIP

FOR IMMEDIATE RELEASE

June 4, 2026

Listed Company Name: Eisai Co., Ltd.
Representative: Haruo Naito
Representative Corporate Officer and CEO
Securities Code: 4523
Stock Exchange Listings: Prime Market of the Tokyo Stock Exchange
Inquiries: Teruyuki Masaka
Vice President, Corporate Communications
Phone +81-3-3817-5120

Notification Regarding Issuance of Unsecured Straight Bonds

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today that it has determined the terms and conditions for the issuance of its 8th, 9th and 10th series of unsecured straight bonds (with limited inter-bond pari passu clause) as outlined below.

The bond issuance is intended to support Eisai's medium- to long-term growth investments by securing stable funding and maintaining financial flexibility, while further diversifying its financing sources. Eisai intends to use the proceeds from the offering for working capital, including research and development expenses for priority development products, investments in licensed-in products, and repayment of short-term debt.

1. Name of the Bonds	8th Series of Eisai Co., Ltd. Unsecured Straight Bonds	9th Series of Eisai Co., Ltd. Unsecured Straight Bonds	10th Series of Eisai Co., Ltd. Unsecured Straight Bonds
2. Maturity	5 years	7 years	10 years
3. Issue amount	JPY 20 billion	JPY 10 billion	JPY 20 billion
4. Denomination of each bond	JPY 100 million
5. Interest rate	2.226% per annum	2.614% per annum	3.022% per annum
6. Issue price	100.00% of the principal amount
7. Redemption price	100.00% of the principal amount
8. Maturity Date	June 10, 2031	June 10, 2033	June 10, 2036
9. Interest payment dates	June 10 and December 10 of each year (Initial interest payment date: December 10, 2026)
10. Method of offering	Public offering
11. Pricing date	June 4, 2026
12. Issue date	June 10, 2026

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13. Collateral and guarantees	The Bonds are not secured by any collateral or guarantees, and no assets have been retained specifically to secure them
14. Financial clauses	The Bonds carry a negative pledge clause (limited inter-bond pari passu clause)
15. Fiscal agent	Mizuho Bank, Ltd.
16. Book-entry transfer institution	Japan Securities Depository Center, Inc.
17. Bond rating	AA- (Rating and Investment Information, Inc.)

Note: This document is a press release intended for publicizing the issuance of the 8th, 9th and 10th Series of Eisai Co., Ltd. Unsecured Straight Bonds (with limited inter-bond pari passu clause) and is not intended as a solicitation for investment or similar activity.

Media Inquiries:
Public Relations Department,
Eisai Co., Ltd.
+81-(0)3-3817-5120