-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 OSn2nKj3Mk2e1dOvGERXN3YSN6pqA5rVayuHm7CJXuOXJcPVH/Cxe3JlzElfosYx
 9F/tsLLoACdUzUhBLohU7A==

<SEC-DOCUMENT>0001504294-10-000003.txt : 20101026
<SEC-HEADER>0001504294-10-000003.hdr.sgml : 20101026
<ACCEPTANCE-DATETIME>20101026145027
ACCESSION NUMBER:		0001504294-10-000003
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
ITEM INFORMATION:		Investment Company Act Section 3(c)
ITEM INFORMATION:		Section 3(c)(1)
FILED AS OF DATE:		20101026
DATE AS OF CHANGE:		20101026
EFFECTIVENESS DATE:		20101026

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Platinum Japan Fund Ltd
		CENTRAL INDEX KEY:			0001504295
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			D0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-149595
		FILM NUMBER:		101141868

	BUSINESS ADDRESS:	
		STREET 1:		73 FRONT STREET
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			HM12
		BUSINESS PHONE:		4412958658

	MAIL ADDRESS:	
		STREET 1:		73 FRONT STREET
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			HM12
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001504295</cik>
        <entityName>Platinum Japan Fund Ltd</entityName>
        <issuerAddress>
            <street1>73 FRONT STREET</street1>
            <city>HAMILTON</city>
            <stateOrCountry>D0</stateOrCountry>
            <stateOrCountryDescription>BERMUDA</stateOrCountryDescription>
            <zipCode>HM12</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>4412958658</issuerPhoneNumber>
        <jurisdictionOfInc>BERMUDA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Other</entityType>
        <entityTypeOtherDesc>open-ended investment company incorporated with limited liability.</entityTypeOtherDesc>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Optima Management</firstName>
                <lastName>Partners LP</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>73 Front Street</street1>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <stateOrCountryDescription>BERMUDA</stateOrCountryDescription>
                <zipCode>HM 12</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Manager</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Dennie</firstName>
                <middleName>Dixon</middleName>
                <lastName>Boardman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10 East 53rd Street</street1>
                <street2>29th Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10022</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Geoffrey</firstName>
                <middleName>Manfred</middleName>
                <lastName>Lewis</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10 East 53rd Street</street1>
                <street2>29th Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10022</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>Richard</middleName>
                <lastName>Rans</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>73 Front Street</street1>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <stateOrCountryDescription>BERMUDA</stateOrCountryDescription>
                <zipCode>HM 12</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <middleName>Charles Ross</middleName>
                <lastName>Collis</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>73 Front Street</street1>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <stateOrCountryDescription>BERMUDA</stateOrCountryDescription>
                <zipCode>HM 12</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ronald</firstName>
                <middleName>Aaron</middleName>
                <lastName>Lake</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>73 Front Street</street1>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <stateOrCountryDescription>BERMUDA</stateOrCountryDescription>
                <zipCode>HM 12</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName>Haskins</middleName>
                <lastName>Davis</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>73 Front Street</street1>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <stateOrCountryDescription>BERMUDA</stateOrCountryDescription>
                <zipCode>HM 12</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>Donald</middleName>
                <lastName>Thomson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>73 Front Street</street1>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <stateOrCountryDescription>BERMUDA</stateOrCountryDescription>
                <zipCode>HM 12</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Hedge Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.1</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>1999-04-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>250000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>BNY Mellon, N.A.</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>BNY Mellon Center</street1>
                    <street2>500 Grant Street</street2>
                    <city>Pittsburgh</city>
                    <stateOrCountry>PA</stateOrCountry>
                    <stateOrCountryDescription>PENNSYLVANIA</stateOrCountryDescription>
                    <zipCode>15258</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>12234000</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse>Item (b) represents the total amount outstanding as of the date of this filing in reliance on the Regulation D exemption.  The original Form D was filed by paper in April 1999.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>28</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>154428</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>The amount of sales commission represents the portion of management and incentive fees paid to BNY Mellon, N.A. to date.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Platinum Japan Fund Ltd</issuerName>
                <signatureName>Geoffrey M. Lewis</signatureName>
                <nameOfSigner>Geoffrey M. Lewis</nameOfSigner>
                <signatureTitle>Director</signatureTitle>
                <signatureDate>2010-10-26</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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