As Filed with the Securities and Exchange Commission on January 10, 2006
                                                     Registration No. 333-
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   ----------

                                    FORM F-6

                             REGISTRATION STATEMENT
                                      under
                           THE SECURITIES ACT OF 1933

         For Depositary Shares Evidenced by American Depositary Receipts

                                   ----------

                              Mori Seiki Co., Ltd.
   (Exact name of issuer of deposited securities as specified in its charter)

                                      N.A.
                   (Translation of issuer's name into English)

                                      Japan
            (Jurisdiction of incorporation or organization of issuer)

                              THE BANK OF NEW YORK
             (Exact name of depositary as specified in its charter)

                      One Wall Street, New York, N.Y. 10286
                            Telephone (212) 495-1784
    (Address, including zip code, and telephone number, including area code,
                  of depositary's principal executive offices)

                                   ----------

                              The Bank of New York
                                  ADR Division
                           One Wall Street, 29th Floor
                               New York, NY 10286
                            Telephone (212)-495-1784
    (Address, including zip code, and telephone number, including area code,
                             of agent for service)

        It is proposed that this filing become effective under Rule 466
                           |_| immediately upon filing
                             |_| on (Date) at (Time)

      If a separate statement has been filed to register the deposited shares,
check the following box. |_|

                         CALCULATION OF REGISTRATION FEE



====================================================================================================================================
                                                                           Proposed maximum     Proposed maximum       Amount of
            Title of each class of                         Amount              Aggregate            aggregate         registration
         Securities to be registered                  to be registered       price per unit(1)   offering price (1)       fee
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             
American Depositary Shares evidenced by American         25,000,000            $.05                 $1,250,000           $133.75
Depositary Receipts, each American Depositary             American
Share evidencing one ordinary share of Mori Seiki        Depositary
Co., Ltd.                                                  Shares
====================================================================================================================================


(1)   Estimated  solely for the purpose of  calculating  the  registration  fee.
      Pursuant  to Rule  457(k),  such  estimate is computed on the basis of the
      maximum  aggregate  fees or charges to be imposed in  connection  with the
      issuance of American  Depositary  Receipts  evidencing American Depositary
      Shares.

The Registrant hereby amends this  Registration  Statement on such date or dates
as may be necessary to delay its effective date until the Registrant  shall file
a further amendment which specifically  states that this Registration  Statement
shall become  effective in accordance with Section 8(a) of the Securities Act of
1933 or until the registration statement shall become effective, on such date as
the Commission, acting pursuant to said Section 8(a), may determine.

- --------------------------------------------------------------------------------




      The  Prospectus  consists  of the  proposed  form of  American  Depositary
Receipt included as Exhibit A to the form of Deposit  Agreement filed as Exhibit
(1) to this Registration Statement, which is incorporated herein by reference.



                                      -2-


                                     PART I

                       INFORMATION REQUIRED IN PROSPECTUS

Item 1. Description of the Securities to be Registered

                              CROSS REFERENCE SHEET



         Item Number and Caption                            Location in Form of
         -----------------------                            American Depositary Receipt
                                                            Filed Herewith as Prospectus
                                                            ----------------------------
                                                      
(1)      Name and address of Depositary                     Introductory Paragraph

(2)      Title of American Depositary Receipts and          Face of American Depositary Receipt, top center
         identity of deposited securities

         Terms of Deposit:

         (i)      The amount of deposited securities        Face of American Depositary Receipt - upper right
                  represented by one unit of American       corner
                  Depositary Shares

         (ii)     The procedure for voting, if any, the     Paragraphs (15) and (16)
                  deposited securities

         (iii)    The collection and distribution of        Paragraphs (12), (14) and (15)
                  dividends

         (iv)     The transmission of notices, reports      Paragraphs (11), (15) and (16)
                  and proxy soliciting material

         (v)      The sale or exercise of rights            Paragraph (13)

         (vi)     The deposit or sale of securities         Paragraphs (12) and (17)
                  resulting from dividends, splits or
                  plans of reorganization

         (vii)    Amendment, extension or termination of    Paragraphs (20) and (21)
                  the Deposit Agreement

         (viii)   Rights of holders of receipts to          Paragraph (11)
                  inspect the transfer books of the
                  Depositary and the list of holders
                  of receipts

         (ix)     Restrictions upon the right to deposit    Paragraphs (2), (3), (4), (5), (6) and (8)
                  or withdraw the underlying securities



                                      -3-




         Item Number and Caption                            Location in Form of
         -----------------------                            American Depositary Receipt
                                                            Filed Herewith as Prospectus
                                                            ----------------------------
                                                      
         (x)      Limitation upon the liability of the      Paragraphs (13) and (18)
                  Depositary

(3)      Fees and Charges                                   Paragraph (7)


Item 2. Available Information



         Item Number and Caption                            Location in Form of
         -----------------------                            American Depositary Receipt
                                                            Filed Herewith as Prospectus
                                                            ----------------------------
                                                      
2(a)     Statement that Mori Seiki Co., Ltd. furnishes      Paragraph (11)
         the Commission with certain public reports and
         documents required by foreign law or otherwise
         under Rule 12g3-2(b) under the Securities
         Exchange Act of 1934  and that such reports and
         documents can be inspected by holders of
         American Depositary Receipts and copied at
         public reference facilities maintained by the
         Commission in Washington, D.C.



                                      -4-


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 3. Exhibits

      (1) Form of Deposit Agreement  (including the form of American  Depositary
Receipt),  dated as of [Date],  among Mori Seiki Co., Ltd. (the  "Issuer"),  The
Bank of New York, as Depositary  (the  "Depositary"),  and each Owner and holder
from time to time of American Depositary Receipts ("ADRs") issued thereunder.

      (4) Opinion of Emmet, Marvin & Martin, LLP, counsel for the Depositary, as
to the legality of the securities being registered.

Item 4. Undertakings

      (a) The  Depositary  hereby  undertakes to make available at the principal
office of the Depositary in the United States,  for inspection by holders of the
ADRs, any reports and communications received from the Issuer which are both (1)
received by the  Depositary  as the holder of the deposited  securities  and (2)
made  generally  available to the holders of the  underlying  securities  by the
Issuer.

      (b) The Depositary  hereby  undertakes to notify each registered holder of
an ADR at least thirty days before any change in the fee schedule.


                                      -5-


                                   SIGNATURES

      Pursuant to the  requirements  of the  Securities Act of 1933, The Bank of
New York, on behalf of the legal entity created by the Deposit Agreement,  dated
as of  ___________________,  2006,  among Mori Seiki Co.,  Ltd., The Bank of New
York, as Depositary, and each Owner and holder of an American Depositary Receipt
issued thereunder  certifies that it has reasonable  grounds to believe that all
the  requirements  for  filing  on Form  F-6 are met and has  duly  caused  this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly  authorized,  in The City of New York,  State of New York,  on January  10,
2006.

                                                   By:THE BANK OF NEW YORK,
                                                   as Depositary

                                                   By: \s\ U. Marianne Erlandsen
                                                       -------------------------
                                                   Name:  U. Marianne Erlandsen
                                                   Title: Vice President


                                      -6-


      Pursuant to the  requirements  of the Securities  Act of 1933,  Mori Seiki
Co., Ltd., has caused this Registration  Statement to be signed on its behalf by
the undersigned, thereunto duly authorized in Japan on January 10, 2006.

                                                        MORI SEIKI CO., LTD.

                                                    By: \s\ Masahiko Mori
                                                        ------------------------
                                                        Name:  Masahiko Mori
                                                        Title: President and CEO

      Pursuant  to  the  requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement has been signed by or on behalf of the following persons
in the capacities indicated on January 10, 2006.

Name                                        Title
- ----                                        -----

\s\ Masahiko Mori                 President and CEO
- -----------------------           (Principal Executive Officer)
Masahiko Mori

\s\ Hiroshi Mizuguchi             Vice-President
- -----------------------
Hiroshi Mizuguchi

\s\ Kyoji Umeoka                  Senior Executive Managing Director
- -----------------------
Kyoji Umeoka

\s\ Kazuyuki Hiramoto             Senior Executive Managing Director
- -----------------------
Kazuyuki Hiramoto

                                  Senior Executive Managing Director
- -----------------------
Takeshi Saito

\s\ Koji Okura                    Managing Director
- -----------------------
Koji Okura


                                      -7-


Name                                        Title
- ----                                        -----

\s\ Hiraku Nakata                 Managing Director
- -----------------------
Hiraku Nakata

\s\ Makoto Fujishima              Managing Director
- -----------------------
Makoto Fujishima

\s\ Yoshitsugu Shigeta            Managing Director
- -----------------------
Yoshitsugu Shigeta

\s\ Hiroaki Tamai                 Director, CFO and CAO
- -----------------------           (Principal Financial and Accounting Officer)
Hiroaki Tamai

\s\ Takahiro Kobi                 Director
- -----------------------
Takahiro Kobi

                                  Director
- -----------------------
Yasunori Hamabe

\s\ Hidefumi Shirotori            Director
- -----------------------
Hidefumi Shirotori

\s\ Toyofumi Nishio               Director
- -----------------------
Toyofumi Nishio

\s\ Masahiro Yanagihara           Authorized Representative in the United States
- -----------------------
Mori Seiki U.S.A., Inc.
By: Masahiro Yanagihara


                                      -8-


                                INDEX TO EXHIBITS

Exhibit
 Number
 ------

(1)         Form of Deposit Agreement, dated as of [Date], among the Issuer, the
            Depositary and each Owner and holder from time to time of ADRs
            issued thereunder.

(4)         Opinion of Emmet, Marvin & Martin, LLP, counsel for the Depositary,
            as to the legality of the securities being registered.


                                      -9-