{{Infobox Perusahaan|name=Eisai Co., Ltd.|logo=[[Image:Eisai logo.svg|200px]]|type=[[public company|Public]] [[Kabushiki kaisha|KK]]|traded_as={{TYO|4523}}<br>[[Topix|TOPIX Large 70 Component]]<br>[[Topix|TOPIX 100 Component]]<br>[[Nikkei 225|Nikkei 225 Component]]|industry=[[Pharmaceutical company|Pharmaceuticals]]|foundation=({{Start date and age|1941|12|06}})|founder=Toyoji Naito|hq_location=4-6-10 Koishikawa, Bunkyo-ku, Tokyo 112-8088, Japan|location=4-6-10 Koishikawa, Bunkyo-ku, Tokyo 112-8088, Japan|key_people=Haruo Naito<br><small>([[President (corporate title)|President]] and [[CEO]])</small>|products={{unbulleted list|[[Eribulin|Halaven]]|[[Donepezil|Aricept]]|[[Rabeprazole|Pariet]]|[[Banzel]]|[[Zonisamide#History|Zonegran]]|[[Perampanel|Fycompa]]|[[Eslicarbazepine acetate|Zebinix]]}}|revenue={{increase}} [[US dollar|US$]] 5.82 billion ([[Fiscal year|FY]] 2013) ([[Japanese yen|JPY]] 600.4 billion) (FY 2013)|net_income={{increase}} US$ 320 million (FY 2013) (JPY 33 billion) (FY 2013)|num_employees=10,419 (consolidated, as of March 31, 2014)|homepage={{Official website|http://www.eisai.com/index.html}}|footnotes=<ref>{{cite web |url=http://www.eisai.com/company/profile/index.html |title=Corporate Information |publisher=Eisai Co., Ltd. |accessdate=February 9, 2015}}{{self-published inline|certain=y|date=March 2015}}</ref>}}{{Nihongo|'''Eisai Co., Ltd.'''|エーザイ株式会社|Ēzai Kabushiki-gaisha}} (<span class="t_nihongo_kanji" lang="ja">エーザイ株式会社</span><span class="t_nihongo_comma" style="display:none">,</span> ''Ēzai Kabushiki-gaisha''<span class="t_nihongo_help noprint"><sup>[[Bantuan:Bahasa Jepang|<span class="t_nihongo_icon" style="color: #00e; font: bold 80% sans-serif; text-decoration: none; padding: 0 .1em;">?</span>]]</sup></span>) adalah perusahaan farmasi Jepang yang berkantor pusat di [[Tokyo]], Jepang. Memiliki sekitar 10.000 karyawan, 1.500 di antaranya bekerja dalam penelitian. '''Eisai''' terdaftar di [[Bursa efek Tokyo|Bursa Saham Tokyo]] dan merupakan anggota dari [[indeks saham]] [[Topix|Topix 100]] dan[[ Nikkei 225]].<ref>{{cite web|url=http://indexes.nikkei.co.jp/en/nkave/index/component?idx=nk225#09|title=Components:Nikkei Stock Average|publisher=[[Nihon Keizai Shimbun]]|accessdate=February 9, 2015}}</ref>
