Nuremberg, February 26, 2010 – Edoxaban, a direct oral factor Xa inhibitor, is now being investigated in a second large-scale pivotal phase III trial, HOKUSAI VTE. This phase III trial, is evaluating the safety and efficacy of edoxaban in the treatment and prevention of recurrent thromboembolic events in patients with deep-vein thrombosis (DVT) and/or pulmonary embolism (PE). HOKUSAI VTE¹ is currently the largest single, randomised, multinational phase III trial for treatment and prevention of recurrent venous thromboembolism (VTE), involving approximately 7.500 patients in 450 clinical sites in 40 countries

“In Europe, VTE affects more than 750,000 people in six major European countries and approximately 370,000 deaths per year are related to VTE in these countries ²,” said Henri Bounameaux, MD, Professor of Medicine, Director of the Division of Angiology and Hemostasis, Chairman of the Department of Medicine at the University Hospital of Geneva, Switzerland, during a press conference organized by DAIICHI SANKYO EUROPE.

Anticoagulants interfere with the coagulation system resulting in a decreased tendency for the formation of blood clots, and are used to treat and prevent thromboembolic events. Existing anticoagulants like heparins and vitamin K antagonists although effective, have several limitations. Heparins are injectable agents and therefore less suitable for long term treatment. Vitamin K antagonists are given orally, but associated with numerous drug-drug and drug-food interactions.

“The current chronic standard treatment of VTE, vitamin K antagonists, requires extensive monitoring and continuous dose adaptation to avoid excessive bleedings and to ensure effective anticoagulation,” said Sebastian Schellong, MD, Professor for Internal Medicine, Head of Medical Division 2, Municipal Hospital Friedrichstadt, Dresden, Germany. “Based on the data on edoxaban we have seen so far, it has a predictable pharmacokinetic and dynamic profile that allows for a convenient once-daily dosing that can be kept constant throughout the treatment period.”

The data is encouraging for patients and supports edoxaban’s potential to significantly improve the management of anticoagulation, while providing effective protection against recurrent thromboembolic events.

“HOKUSAI VTE is intended to show that VTE patients can be treated effectively and safely with the most simple and most convenient dosing regimen among factor Xa inhibitors,” said Harry R. Büller, MD, Professor of Internal Medicine, Chairman of the Department for Vascular Medicine at the Academic Medical Center, Amsterdam, The Netherlands and Chairman of the HOKUSAI VTE steering committee.

HOKUSAI VTE is an event-driven, double-blind, double-dummy, parallel-group study, which will randomise patients to two different treatment groups. Both groups will receive enoxaparin or unfractionated heparin for at least five and up to 12 days, followed by double-blind warfarin with a target INR of 2-3 or edoxaban 60 mg once-daily. Patients will be treated for up to 12 months in accordance to the standard of care and international guidelines.
The primary efficacy endpoint for HOKUSAI VTE is the recurrence of symptomatic VTE (i.e. the composite of DVT, non-fatal PE, and fatal PE). The primary safety assessment of the trial is the incidence of major and clinically relevant non-major bleeding. The sponsor, DAIICHI SANKYO, expects the study to conclude in 2012.

The HOKUSAI VTE study is named after the famous Japanese artist and painter Katsushika Hokusai (1760-1849) of the former Edo period; “Edo” is the city currently known as Tokyo, the location of the DAIICHI SANKYO global headquarters.

In addition to the HOKUSAI VTE study, an ongoing, multinational, randomised, double blind, phase III study, aims to demonstrate the safety and efficacy profile of edoxaban amongst more than 16,500 patients with atrial fibrillation (ENGAGE AF-TIMI 48)³.

CONTACT:
Dr. Michaela Paudler-Debus
Vice Director
Head of Product PR Corporate Communications and Public Affairs
Phone +49(0)89/78 08 - 685
michaela.paudler-debus@daiichi-sankyo.eu

Dr. Felix Münzel
Vice Director
Medical and Scientific Affairs CV
Phone +49(0)89/78 08 - 471
felix.muenzel@daiichi-sankyo.eu


<sup>Forward-looking statements
This press release contains forward-looking statements and information about future developments in the sector, and the legal and business conditions of DAIICHI SANKYO EUROPE GmbH. Such forward-looking statements are uncertain and are subject at all times to the risks of change, particularly to the usual risks faced by a global pharmaceutical company, including the impact of the prices for products and raw materials, medication safety, changes in exchange rates, government regulations, employee relations, taxes, political instability and terrorism as well as the results of independent demands and governmental inquiries that affect the affairs of the company. All forward-looking statements contained in this release hold true as of the date of publication. They do not represent any guarantee of future performance. Actual events and developments could differ materially from the forward-looking statements that are explicitly expressed or implied in these statements. DAIICHI SANKYO EUROPE GmbH assumes no responsibility for the updating of such forward-looking statements about future developments of the sector, legal and business conditions and the company.

References:
1 Clinicaltrials.gov : NCT00986154, Available at http://www.clinicaltrials.gov/ct2/show/NCT00986154?term=hokusai&rank=1  Accessed December 3, 2009.
2 Cohen AT et al. Venous Thromboembolism (VTE) in Europe. Thromb Haemost 2007; 98:756-64.
3 ClinicalTrials.gov Identifier: NCT00781391
http://www.clinicaltrials.gov/ct2/show/NCT00781391?term=DU-176b&rank=1 . Accessed December 3, 2009.</sup>