Information in the news releases is current on the date of the announcement, but is subject to change without prior notice. |
| 2007 Release |
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| December 27, 2007 |
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U.S. District Court Decision about Eisai's Legal Action over Aricept ODT® ANDA Filing

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| December 25, 2007 |
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Eisai Introduces New Aricept® Dose Formulations for Treatment of Severe Alzheimer's Disease in Japan

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| December 18, 2007 |
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Eisai Enters into In-licensing Agreement with Minophagen Pharmaceutical for Liver Disease/Allergic Disease Agents Stronger Neo-Minophagen® C and Glycyron® Tablets for Allergic Disease

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| December 10, 2007 |
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Eisai to Acquire MGI PHARMA, INC.

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| December 6, 2007 |
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Eisai Celebrates Ground-Breaking Ceremony For New Manufacturing and Research Base in India

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| December 4, 2007 |
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Eisai and BioArctic Neuroscience Enter Exclusive Licensing Agreement with Novel Antibody Treatment for Alzheimer's Disease

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| November 29, 2007 |
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Eisai Submits NDA Application of KES524 for Obesity Management in Japan

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| October 30, 2007 |
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Eisai Announces Change in Regulatory Submission Strategy of E2007 for Parkinson's Disease

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| September 28, 2007 |
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Eisai Announces Establishment of New Pharmaceutical Marketing Subsidiary in Belgium

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| September 28, 2007 |
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Kissei and Eisai sign a license agreement to develop and commercialize Glufast®, a rapid-acting insulin secretagogue in China

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| September 25, 2007 |
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Abbott and Eisai submit application for adalimumab, the only fully human monoclonal anti-TNF antibody, to treat psoriasis

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| September 5, 2007 |
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Eisai Inc. Enters Exclusive Agreement with Salix Pharmaceuticals, Ltd. to Co-promote “COLAZAL®” for the Treatment of Ulcerative Colitis in the U.S. Market

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| August 24, 2007 |
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Approval of an additional dosage and administration for secondary eradication of Helicobacter pylori for proton pump inhibitors in Japan

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| August 23, 2007 |
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Aricept® Receives Approval for Additional Efficacy and Dosage For Treatment of Severe Alzheimer's Disease in Japan

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| August 23, 2007 |
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Sanko Junyaku and Eisai to Co-promote “Picolumi® ucOC”, Diagnostic Agent Introduced by Sanko Junyaku New Diagnostic Agent Helps Physicians Make Prescribing Choice for Vitamin K2 Medication Therapy for Osteoporosis Patients

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| August 11, 2007 |
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UK High Court Ordered NICE To Amend A Guidance for Alzheimer's Disease

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| August 10, 2007 |
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UK High Court Ruled NICE Guidance for Alzheimer's Disease Discriminatory

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| July 31, 2007 |
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Continuation of Policy for Protection of the Company's Corporate Value and Common Interests of Shareholders

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| July 27, 2007 |
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Eisai Co-promotes “PyloriTek® Test Kit”, H. Pylori Infection Diagnostic Kit Launched by Sanko Junyaku

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| July 27, 2007 |
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Eisai Enters into In-licensing Agreement with Sepracor for Eszopiclone Insomnia Treatment

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| July 17, 2007 |
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New Individually-Wrapped Tablets Introduced to Selbelle®: Stomach Medication that Protects Gastric Mucosa from Stomach Acid Now Available in Easy-to-Carry Package

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| July 11, 2007 |
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Eisai Launches “Nitorol® Injection 5 mg Syringe” and “Nitorol® Continuous Intravenous Infusion 25 mg Syringe”, First Nitric Acid Syringe Formulations Approved in Japan

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| July 9, 2007 |
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Notice on Details of Stock Options (New Share Acquisition Rights) to be Allocated

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| June 26, 2007 |
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Tambocor® (Antiarrthymic Treatment) Received Approval for Paroxysmal Atrial Fibrillation/Flutter

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| June 22, 2007 |
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Notice on Allocation of Stock Options (Stock Acquisition Rights)

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| June 16, 2007 |
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Inovelon® launched in Germany

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| June 15, 2007 |
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A ONCE-WEEKLY ANTIOSTEOPOROTIC AGENT “ACTONEL® 17.5 mg TABLETS” IS LAUNCHED.

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| June 12, 2007 |
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Kissei and Eisai sign a license agreement to develop and commercialize Glufast®, a rapid-acting insulin secretagogue in 10 ASEAN countries

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| May 15, 2007 |
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Eisai Signs Exclusive Agreement to Commercialize NeuroBloc® for Europe

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| May 15, 2007 |
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Eisai Submits Application for Gastroprokinetic Agent Gasmotin® in Thailand

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| May 15, 2007 |
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Notice on New Stock Issuance in the Form of Stock Options

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| May 15, 2007 |
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Basic Principle and Policies concerning Reduction of Minimum Trading Lots for Shares

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| May 12, 2007 |
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EISAI OBTAINS FAVORABLE RULING IN ACIPHEX® PATENT INFRINGEMENT LAWSUIT AGAINST TEVA PHARMACEUTICALS AND DR. REDDY'S LABORATORIES

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| May 7, 2007 |
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Eisai Introduces “Chocola BB® Light 2” Vitamin B2 Drink A New Drink with Enhanced Formula and Reduced Calories

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| May 7, 2007 |
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FDA Approves FRAGMIN®, an Injectable Anti-Clotting Agent, for Extended Treatment to Reduce the Recurrence of Blood Clots in Patients with Cancer

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| April 26, 2007 |
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Eisai Announces Complete Subsidiarization of Sanko Junyaku

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| April 18, 2007 |
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A ONCE-WEEKLY FORMULATION OF RISEDRONATE SODIUM HYDRATE, AN ANTIOSTEOPOROTIC AGENT, WAS APPROVED.

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| April 17, 2007 |
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Eisai Announces Completion of Acquisition of Morphotek

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| April 13, 2007 |
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Eisai Withdraw Application for Additional Indication of Aricept® for Treatment of Severe Alzheimer's Disease in Europe

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| March 26, 2007 |
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Asahi Kasei Pharma Corporation and Eisai Co., Ltd.
Signed License Agreement for Vasodilator Eril® in Korea

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| March 22, 2007 |
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EISAI TO ACQUIRE MORPHOTEK
Eisai's Dramatic Leap towards Biologic Therapeutics Evidenced by the Acquisition

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| March 5, 2007 |
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Eisai Establishes New Manufacturing Subsidiary in United Kingdom

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| March 1, 2007 |
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Eisai and Abbott Announce Amendment to Agreement for the Co-promotion of Rheumatoid Arthritis Drug HUMIRA® in Taiwan and Korea

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| February 2, 2007 |
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Notice Regarding Revision of Year End Dividend Forecast For Fiscal Year Period (95th Company Fiscal Period) Ending March 2007

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| January 30, 2007 |
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Proton Pump Inhibitor Pariet® Tablets 10mg Receives Approval in Japan for Helicobacter Pylori Eradication

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| January 22, 2007 |
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Inovelon® recieves Marketing Authorization Approval from European Commission

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