Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  Matsuda Kazuko
 2. Date of Event Requiring Statement (Month/Day/Year)
09/01/2011		 3. Issuer Name and Ticker or Trading Symbol
MEDICINOVA INC [MNOV]
(Last)
(First)
(Middle)
C/O MEDICINOVA, INC., 4350 LA JOLLA VILLAGE DRIVE, STE. 950		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Medical Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAN DIEGO, CA 92122		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 13,805
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Common Stock Warrant (Right to Buy) 03/29/2011 03/29/2016 Common Stock 9,200 $ 3.56 D  
Options to Purchase Common Stock (Right to Buy)   (1) 07/08/2016 Common Stock 8,000 $ 11.48 D  
Options to Purchase Common Stock (Right to Buy)   (2) 07/06/2019 Common Stock 37,000 $ 4.8 D  
Options to Purchase Common Stock (Right to Buy)   (3) 01/28/2020 Common Stock 11,900 $ 7.34 D  
Options to Purchase Common Stock (Right to Buy)   (4) 06/13/2020 Common Stock 20,000 $ 5.13 D  
Options to Purchase Common Stock (Right to Buy)   (5) 07/12/2021 Common Stock 75,000 $ 2.54 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Matsuda Kazuko
C/O MEDICINOVA, INC.
4350 LA JOLLA VILLAGE DRIVE, STE. 950
SAN DIEGO, CA 92122		       Chief Medical Officer  

Signatures

/s/ Kazuko Matsuda 09/27/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The shares subject to the stock option vest and become exercisable over a three (3) year period commencing July 9, 2006, in equal monthly installments.
(2) The shares subject to the stock option vest and become exercisable over a four (4) year period commencing July 7, 2009, in equal monthly installments.
(3) The shares subject to the stock option vest and become exercisable over a four (4) year period commencing January 29, 2010, in equal monthly installments.
(4) The shares subject to the stock option vest and become exercisable over a four (4) year period commencing June 14, 2010, in equal monthly installments.
(5) The shares subject to the stock option vest and become exercisable over a four (4) year period commencing July 13, 2011, in equal monthly installments.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.