SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                 SCHEDULE 13G


                                 (Rule 13d-102)


             INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2


                   Under the Securities Exchange Act of 1934
                          (Amendment No. 7)


                            KEYSTONE PROPERTY TRUST
             -----------------------------------------------------
                                (Name of Issuer)
                                  Common Stock
              -----------------------------------------------------
                         (Title of Class of Securities)

                                   493596100
             -----------------------------------------------------
                                 (CUSIP Number)



Check the following box if a fee is  being paid with this statement [x].


----------
*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



CUSIP No. 493596100                 13G                    Page 2  of 8 Pages



--------------------------------------------------------------------------------
   1.  NAME OF REPORTING PERSON(S)
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON(S)

       Morgan  Stanley  Dean  Witter &  Co.
       IRS  #  39-314-5972
--------------------------------------------------------------------------------
   2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [  ]
--------------------------------------------------------------------------------
   3.  SEC USE ONLY


--------------------------------------------------------------------------------
   4.  CITIZENSHIP OR PLACE OF ORGANIZATION

       The state of organization is Delaware.
--------------------------------------------------------------------------------
   NUMBER OF      5.   SOLE VOTING POWER
     SHARES            0
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      6.   SHARED VOTING POWER
      EACH             189
   REPORTING      --------------------------------------------------------------
     PERSON       7.   SOLE DISPOSITIVE POWER
      WITH
                  --------------------------------------------------------------
                  8.   SHARED DISPOSITIVE POWER
                       189
--------------------------------------------------------------------------------
   9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       189
--------------------------------------------------------------------------------
  10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

--------------------------------------------------------------------------------
  11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       .0010%
--------------------------------------------------------------------------------
  12.  TYPE OF REPORTING PERSON*

       IA,  CO
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


CUSIP No. 493596100              13G                    Page 3  of  8  Pages



--------------------------------------------------------------------------------
   1.  NAME OF REPORTING PERSON(S)
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON(S)

       Morgan Stanley Investment Management Inc.
       IRS  #  13-3040307
--------------------------------------------------------------------------------
   2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [  ]
--------------------------------------------------------------------------------
   3.  SEC USE ONLY


--------------------------------------------------------------------------------
   4.  CITIZENSHIP OR PLACE OF ORGANIZATION

       The state of organization is Delaware.
--------------------------------------------------------------------------------
   NUMBER OF      5.   SOLE VOTING POWER
     SHARES             0
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      6.   SHARED VOTING POWER
      EACH             0
   REPORTING      --------------------------------------------------------------
     PERSON       7.   SOLE DISPOSITIVE POWER
      WITH             0
                  --------------------------------------------------------------
                  8.   SHARED DISPOSITIVE POWER
                       0
--------------------------------------------------------------------------------
   9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       0
--------------------------------------------------------------------------------
  10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


--------------------------------------------------------------------------------
  11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       0%
--------------------------------------------------------------------------------
  12.  TYPE OF REPORTING PERSON*

       IA, CO
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!



CUSIP No. 493596100                   13G                   Page 4  of 8 Pages





Item 1.     (a)   Name of Issuer:
                  KEYSTONE PROPERTY TRUST
                  --------------------------------------------------------------
            (b)   Address of Issuer's Principal Executive Offices:
                  200 FOUR FALLS CORPORATE CENTER
                  SUITE 208
                  WEST CONSHOHOCKEN, PA 19428
                  --------------------------------------------------------------
Item 2.     (a)   Name of Person Filing:
                  (a) Morgan Stanley Dean Witter & Co.
                  (b) Morgan Stanley Investment Management Inc.
                  --------------------------------------------------------------
            (b)   Address of Principal Business Office, or if None, Residence:
                  (a) 1585 Broadway
                      New  York, New  York  10036

                  (b) 1221 Avenue of the Americas
                      New  York,  New  York  10020
                  --------------------------------------------------------------
            (c)   Citizenship:
                  Incorporated  by  reference  to  Item  4  of  the
                  cover page  pertaining  to  each  reporting  person.
                  --------------------------------------------------------------
            (d)   Title of Class of Securities:
                  Common Stock
                  --------------------------------------------------------------
            (e)   CUSIP Number:
                  493596100
                  --------------------------------------------------------------

Item 3.     (a)   Morgan Stanley Dean Witter & Co. is a parent holding company

            (b)   Morgan Stanley Investment Management Inc. is (e)
                  an Investment Adviser registered under Section 203 of the
                  Investment Advisers Act of 1940.




CUSIP No. 493596100                  13-G                   Page 5  of  8  Pages



Item 4.     Ownership.


            Incorporated  by  reference  to  Items  (5) - (9) and (11) of the
            cover page.

Item 5.     Ownership of Five Percent or Less of a Class.

            (a)     As of the date hereof,  Morgan Stanley Dean Witter and Co.
                    has ceased to be the beneficial  owner of more than five
                    percent of the class of securities.

            (b)     As of the date hereof, Morgan Stanley Investment Management
                    Limited has ceased to be the beneficial owner of more than
                    five percent of the class of securities.

Item 6.     Ownership of More Than Five Percent on Behalf of Another Person.

            Inapplicable

Item 7.     Identification and Classification of the Subsidiary which Acquired
            the Security Being Reported on By the Parent Holding Company.

Item 8.     Identification and Classification of Members of the Group.

Item 9.     Notice of Dissolution of Group.

Item 10.    Certification.

            By signing  below I certify that, to the best of my knowledge and
            belief,  the  securities  referred to above were  acquired in the
            ordinary course of business and were not acquired for the purpose
            of and do not have the  effect of  changing  or  influencing  the
            control of the issuer of such securities and were not acquired in
            connection  with or as a participant  in any  transaction  having
            such purpose or effect.


CUSIP No. 493596100                  13-G                   Page 6  of  8 Pages


                                  Signature.


            After reasonable inquiry and to the best of my knowledge and
            belief, I certify that the information set forth in this
            statement is true, complete and correct.


Date:       May 10, 2002


Signature:  /s/ Dennine Bullard
            -----------------------------------------------------------------

Name/Title  Dennine Bullard/Vice President Morgan Stanley & Co. Incorporated
            -----------------------------------------------------------------
            MORGAN STANLEY DEAN WITTER & CO.

Date:       May 10, 2002


Signature:  /s/ James P. Wallin
            -----------------------------------------------------------------

Name/Title  James Wallin /Executive Director, Morgan Stanley Investment
                          Management Inc.
            -----------------------------------------------------------------
            MORGAN STANLEY INVESTMENT MANAGEMENT INC.

                      INDEX TO EXHIBITS                             PAGE
                      -----------------                             ----

EXHIBIT 1       Agreement to Make a Joint Filing                       7

EXHIBIT 2       Secretary's Certificate Authorizing Dennine Bullard 8
                to Sign on behalf of Morgan Stanley Dean Witter & Co.


               *  Attention. Intentional misstatements or omissions of fact
               constitute federal criminal violations (see 18 U.S.C. 1001).

(022597DTI)

                   EX-99
            JOINT FILING AGREEMENT



CUSIP No. 493596100                   13-G                   Page 7  of  8 Pages


                            EXHIBIT 1 TO SCHEDULE 13G
               ---------------------------------------------------


                                MAY 10, 2002
               ---------------------------------------------------


               MORGAN STANLEY DEAN WITTER & CO. and MORGAN STANLEY

               INVESTMENT MANAGEMENT INC. hereby agree that, unless

               differentiated, this Schedule 13G is filed on behalf of each of

               the parties.


            MORGAN STANLEY DEAN WITTER & CO.

            BY: /s/ Dennine Bullard
            --------------------------------------------------------------------
            Dennine Bullard /Vice President Morgan Stanley & Co. Incorporated

            MORGAN STANLEY INVESTMENT MANAGEMENT INC.

            BY: /s/ James P. Wallin
            --------------------------------------------------------------------
            James P. Wallin /Executive Director, Morgan Stanley Investment
                             Management Inc.

* Attention. Intentional misstatements or omissions of fact constitute federal
  criminal violations (see 18 U.S.C. 1001).


                   EX-99
              SECRETARY'S CERTIFICATE



                                                             Page 8 of 8 pages
                                  EXHIBIT 2                   ------------------

                 MORGAN STANLEY, DEAN WITTER, DISCOVER & CO.

                           SECRETARY'S CERTIFICATE


         I, Charlene R. Herzer, a duly elected and Assistant Secretary
         of Morgan Stanley Dean Witter & Co., a corporation organized and
         existing under the laws of the State of Delaware (the
         "Corporation"), certify that Stuart J.M. Breslow, Robert G. Koppenol
         and Dennine Bullard are authorized to sign reports to be filed under
         Sections 13 and 16 of the Securities Exchange Act of 1934 (the "Act")
         pursuant to the following:

             (1)      On May 31, 1997, the Board of Directors of the
                      Corporation granted authority to Stuart J.M.
                      Breslow and Robert G. Koppenol to sign reports to be
                      filed under Sections 13 and 16 of the Act on behalf of
                      the Corporation.

             (2)      On February 23, 2000, Donald G. Kempf, Jr., the Executive
                      Vice President, Chief Legal Officer and Secretary of the
                      Corporation, delegated  authority to Dennine Bullard to
                      sign reports to be filed under Sections 13 and 16 of the
                      Act on behalf of the  Corporation. Pursuant to Section
                      7.01 of the Bylaws of the  Corporation  and resolutions
                      approved by the Board of Directors of the Corporation on
                      September 25, 1998, the Chief Legal Officer is authorized
                      to enter into agreements and other instruments on behalf
                      of the Corporation and may delegate such powers to others
                      under his jurisdiction.

          IN WITNESS WHEREOF, I have hereunto set my name and affixed the seal
          of the Corporation as of the 1st day of March, 2000.

                                                ______________________________
                                                Charlene R. Herzer
                                                Assistant Secretary