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{{Nihongo|'''Nippon Life Insurance Company'''|日本生命保険相互会社|Nihon Seimei Hoken Sōgo-gaisha}}, {{Nihongo|'''Nissay'''|ニッセイ|Nissei}} eller {{Nihongo|'''Nihon Seimei'''|日本生命|}} er et [[japan]]sk [[livsforsikring]]sselskab. Det blev etableret i 1889 som ''Nippon Life Assurance Co., Inc.''.<ref>{{cite web    | title = 2006 Annual Report, Chapter 4 | publisher = Nippon Life Insurance Company  | url = https://www.nissay.co.jp/english/annual/pdf/ar2006.pdf  | access-date = 2007-01-08 }}</ref><ref>{{cite news|last1=Sanjai|first1=P.R.|last2=Bhaskaran|first2=Deepti|title=Nippon Life to pay Rs2,265 crore to raise stake in Reliance Life to 49%|url=http://www.livemint.com/Companies/1FucZOG5iYA5uPpPpjtaeP/Nippon-Life-to-pay-Rs2265-crore-to-raise-stake-in-Reliance.html|access-date=26. juni 2016|publisher=Live Mint|date=2. december 2015}}</ref><ref name=K>{{Cite web|url=http://www.fortune.com/company/nippon-life-insurance/global500/.|title = Nippon Life Insurance &#124; 2020 Global 500}}</ref>
Nippon Life havde 92.120 ansatte og en omsætning på 74 mia. US$ i 2020.<ref name=K>{{Cite web|url=http://www.fortune.com/company/nippon-life-insurance/global500/.|title = Nippon Life Insurance &#124; 2020 Global 500}}</ref> De har hovedkvarter i [[Osaka]].
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