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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 A7OZQm/PHZb1R1zAAXer9IOiqqpx67mcPFKgmM9H9bUhIVOOuUL98zveb4sAxSId
 yQ5IY0PvPNXD54cNgYswwg==

<SEC-DOCUMENT>9999999995-07-005015.txt : 20071220
<SEC-HEADER>9999999995-07-005015.hdr.sgml : 20071220
<ACCEPTANCE-DATETIME>20071220001520
ACCESSION NUMBER:		9999999995-07-005015
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20071219
DATE AS OF CHANGE:		20071220
EFFECTIVENESS DATE:		20071219

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MITSUI SUMITOMO INSURANCE CO LTD
		CENTRAL INDEX KEY:			0001142206
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			M0
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-148157
		FILM NUMBER:		071317694

	BUSINESS ADDRESS:	
		STREET 1:		27-2, SHINKAWA 2-CHOME
		STREET 2:		CHUO-KU
		CITY:			TOKYO
		STATE:			M0
		ZIP:			104-8252
		BUSINESS PHONE:		81332971111

	MAIL ADDRESS:	
		STREET 1:		27-2, SHINKAWA 2-CHOME
		STREET 2:		CHUO-KU
		CITY:			TOKYO
		STATE:			M0
		ZIP:			104-8252
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2007-12-19</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>16:00:00</finalEffectivenessDispTime>
        <form>F-4</form>
        <filer>
            <cik>0001142206</cik>
            <entityName>MITSUI SUMITOMO INSURANCE CO LTD</entityName>
            <fileNumber>333-148157</fileNumber>
        </filer>
    </effectiveData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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