<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2022-01-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001776197</issuerCik>
        <issuerName>AKUMIN INC.</issuerName>
        <issuerTradingSymbol>AKU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001738045</rptOwnerCik>
            <rptOwnerName>SCW Capital Management, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3131 TURTLE CREEK BLVD., #302</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001638046</rptOwnerCik>
            <rptOwnerName>SCW Capital, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3131 TURTLE CREEK BLVD., #302</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001738855</rptOwnerCik>
            <rptOwnerName>SCW Capital QP, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3131 TURTLE CREEK BLVD., #302</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001820813</rptOwnerCik>
            <rptOwnerName>SCW Single-Asset Partnership, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3131 TURTLE CREEK BLVD., #302</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001823555</rptOwnerCik>
            <rptOwnerName>SCW Single-Asset Partnership QP, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3131 TURTLE CREEK BLVD., #302</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001056313</rptOwnerCik>
            <rptOwnerName>SMITH G STACY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3131 TURTLE CREEK BLVD., #302</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4355203</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1903597</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2095851</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3065257</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F8"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>60000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>110000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F10"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33309</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F11"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This statement is jointly filed by and on behalf of each of SCW Capital, LP (&quot;SCW Capital&quot;), SCW Capital QP, LP (&quot;SCW Capital QP&quot;), SCW Single-Asset Partnership, LP (&quot;SCW Single-Asset Partnership&quot;), SCW Single-Asset Partnership QP, LP (&quot;SCW Single-Asset Partnership QP&quot;), Trinity Investment Group, LLC (&quot;Trinity&quot;), SCW Capital Management, LP (&quot;SCW Capital Management&quot;), Robert N. Cathey, John R. Wagner, and G. Stacy Smith. SCW Capital, SCW Capital QP, SCW Single-Asset Partnership, SCW Single-Asset Partnership QP, Robert N. Cathey, John R. Wagner, and G. Stacy Smith are the direct beneficial owners of the securities covered by this statement.</footnote>
        <footnote id="F2">SCW Capital Management is the investment manager of, and may be deemed to beneficially own securities owned by, each of SCW Capital, SCW Capital QP, SCW Single-Asset Partnership, and SCW Single-Asset Partnership QP. Trinity is the general partner of, and may be deemed to beneficially own securities owned by, each of SCW Capital, SCW Capital QP, SCW Single-Asset Partnership, SCW Single-Asset Partnership QP, and SCW Capital Management. Robert N. Cathey, John R. Wagner, and G. Stacy Smith are the co-managers of, and may each be deemed to beneficially own securities owned by, Trinity.</footnote>
        <footnote id="F3">Each reporting person states that neither the filing of this statement nor anything herein shall be deemed an admission that such person is, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the &quot;Act&quot;) or otherwise, the beneficial owner of any securities covered by this statement. Each reporting person disclaims beneficial ownership of the securities covered by this statement, except to the extent of the pecuniary interest of such person in such securities.</footnote>
        <footnote id="F4">Each reporting person may be deemed to be a member of a group with respect to the issuer or securities of the issuer for purposes of Section 13(d) or 13(g) of the Act. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, a member of a group with respect to the issuer or securities of the issuer.</footnote>
        <footnote id="F5">SCW Capital, LP is the record and direct beneficial owner of these securities of the issuer.</footnote>
        <footnote id="F6">SCW Capital QP, LP is the record and direct beneficial owner of these securities of the issuer.</footnote>
        <footnote id="F7">SCW Single-Asset Partnership, LP is the record and direct beneficial owner of these securities of the issuer.</footnote>
        <footnote id="F8">SCW Single-Asset Partnership QP, LP is the record and direct beneficial owner of these securities of the issuer.</footnote>
        <footnote id="F9">Robert N. Cathey is the record and direct beneficial owner of these securities of the issuer.</footnote>
        <footnote id="F10">John R. Wagner is the record and direct beneficial owner of these securities of the issuer.</footnote>
        <footnote id="F11">G. Stacy Smith is the record and direct beneficial owner of these securities of the issuer.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>SCW CAPITAL MANAGEMENT, LP, By: Trinity Investment Group, LLC, Its: General Partner, By: /s/ John R. Wagner, Name: John R. Wagner, Title: Co-Managing Member</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>SCW CAPITAL, LP, By: Trinity Investment Group, LLC, Its: General Partner, By: /s/ John R. Wagner, Name: John R. Wagner, Title: Co-Managing Member</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>SCW CAPITAL QP, LP, By: Trinity Investment Group, LLC, Its: General Partner, By: /s/ John R. Wagner, Name: John R. Wagner, Title: Co-Managing Member</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>SCW SINGLE-ASSET PARTNERSHIP, LP, By: Trinity Investment Group, LLC, Its: General Partner, By: /s/ John R. Wagner, Name: John R. Wagner, Title: Co-Managing Member</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>SCW SINGLE-ASSET PARTNERSHIP QP, LP, By: Trinity Investment Group, LLC, Its: General Partner, By: /s/ John R. Wagner, Name: John R. Wagner, Title: Co-Managing Member</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>TRINITY INVESTMENT GROUP, LLC, By: /s/ John R. Wagner, Name: John R. Wagner, Title: Co-Managing Member</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ROBERT N. CATHEY, /s/ Robert N. Cathey</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>G. STACY SMITH, /s/ G. Stacy Smith</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>JOHN R. WAGNER, /s/ John R. Wagner</signatureName>
        <signatureDate>2022-01-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
