-----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,
 GAQjNlvec8dLqXhVXPC6ZyQvU56TLNnu+sAwqIVMQpqqjhBkoFP30oj6HgmW2bgn
 LASmMFU+cExRM3Sakj17pA==

<SEC-DOCUMENT>0001181431-08-052013.txt : 20080908
<SEC-HEADER>0001181431-08-052013.hdr.sgml : 20080908
<ACCEPTANCE-DATETIME>20080908184052
ACCESSION NUMBER:		0001181431-08-052013
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080904
FILED AS OF DATE:		20080908
DATE AS OF CHANGE:		20080908

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HOKU SCIENTIFIC INC
		CENTRAL INDEX KEY:			0001178336
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				990351487
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		1075 OPAKAPAKA STREET
		CITY:			KAPOLEI
		STATE:			HI
		ZIP:			96707
		BUSINESS PHONE:		808-682-7800

	MAIL ADDRESS:	
		STREET 1:		1075 OPAKAPAKA STREET
		CITY:			KAPOLEI
		STATE:			HI
		ZIP:			96707

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HIRATA DEAN K
		CENTRAL INDEX KEY:			0001229608

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51458
		FILM NUMBER:		081061805

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		808-535-2583

	MAIL ADDRESS:	
		STREET 1:		220 SOUTH KING STREET
		CITY:			HONOLULU
		STATE:			HI
		ZIP:			96813
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd218123.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-09-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001178336</issuerCik>
        <issuerName>HOKU SCIENTIFIC INC</issuerName>
        <issuerTradingSymbol>HOKU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001229608</rptOwnerCik>
            <rptOwnerName>HIRATA DEAN K</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CENTRAL PACIFIC BANK</rptOwnerStreet1>
            <rptOwnerStreet2>220 S. KING ST., 3RD FLR</rptOwnerStreet2>
            <rptOwnerCity>HONOLULU</rptOwnerCity>
            <rptOwnerState>HI</rptOwnerState>
            <rptOwnerZipCode>96813</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.55</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-09-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6666</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2018-09-03</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>6666</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33332</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">1/12th of the shares vest monthly commencing on the second anniversay of the date of grant.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Dean K. Hirata</signatureName>
        <signatureDate>2008-09-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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