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News Release

FOR IMMEDIATE RELEASE
August 27, 2004

Notice Concerning the Revision of Eisai Co., Ltd. and Consolidated
Subsidiaries Quarterly Financial Report for the Period Ended June 30, 2004


Listed Stock Name:   Eisai Co., Ltd.
President & CEO: Mr. Haruo Naito
Headquarters: 4-6-10 Koishikawa, Bunkyo-ku, Tokyo
Securities Code: 4523
Listed Locations: First Sections of the Tokyo Stock Exchange
& the Osaka Securities Exchange
Inquiries: Mr. Hiroyuki Mitsui
Vice President
Corporate Communications
Phone: +81-3-3817-5085


Notice Concerning the Revision of Eisai Co., Ltd. and Consolidated
Subsidiaries Quarterly Financial Report for the Period Ended June 30, 2004


Revisions were made to "Consolidated Quarterly Financial Results" and "Reference Data" of Eisai Co., Ltd. and consolidated subsidiaries for the fiscal period ended June 30, 2004 that had been disclosed on July 30, 2004 as attached.

On consolidating the 1st quarter financials, an error occurred in eliminating unrealized profits/losses as to inter-company inventory in connection with active pharmaceutical ingredients (APIs) not yet delivered as of the end of the fiscal period at issue which the parent company in Japan exported to its US subsidiary, thereby mandating several corrections in the relevant parts of the financial report.

In response to such an incident, Eisai Co., Ltd., regretting having inconvenienced related parties, strives to ensure proper measures by reviewing and reinforcing closing procedures as well as check system, including those of consolidated entities, for purposes of preventing recurrence thereof.

In the meantime, this revision of the financial report will not affect our financial forecast for the half-year and full fiscal year period.


[Revised materials attached]
1.   Errata on "Consolidated Quarterly Financial Results"
(Note: Revised parts appear bold and underlined.)
2.   Errata on "Reference Data"
(Note: Revised parts appear bold and underlined.)
3.  Revised version of "Consolidated Quarterly Financial Results" and "Reference Data"