FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934

For the month of March, 2005

Commission File Number 1-7616

PIONEER CORPORATION

4-1, MEGURO 1-CHOME, MEGURO-KU, TOKYO 153-8654, JAPAN

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F:

Form 20-F þ                    Form 40-F o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):           

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):           

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes o                    No þ

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-

Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

This report on Form 6-K contains the following:

Pioneer Announces Year-End Dividend for Fiscal 2005

TOKYO — Pioneer Corporation has announced a year-end cash dividend of ¥12.5 per share of common stock for fiscal 2005, ending March 31, the same amount as the previous fiscal year. Subject to resolution at a meeting of the Company’s board of directors to be held in late April and approval at an ordinary general meeting of shareholders to be held in late June, the dividend will be paid to shareholders or pledgees registered as of March 31, 2005, Japan time.

The Company’s policy on dividends allows for dividend continuance and stability. In addition, the Company determines the appropriate dividend amount, taking into consideration its financial condition, consolidated business results and other factors.

     [Dividend Amount per Share of Common Stock]

Pioneer Corporation is one of the leading manufacturers of consumer- and business-use electronics products such as audio, video and car electronics on a global scale. Its shares are traded on the New York Stock Exchange (ticker symbol PIO), Euronext Amsterdam, Tokyo Stock Exchange, and Osaka Securities Exchange.

#           #           #           #           #          #

For further information, please contact:
Hideki Okayasu
Senior Executive Officer and General Manager, Finance and Accounting Division
Pioneer Corporation, Tokyo
Phone: +81-3-3494-1111 / Fax: +81-3-3495-4431
E-mail: pioneer_shr@post.pioneer.co.jp
Website: http://www.pioneer.co.jp/corp/ir/index-e.html

Pioneer to Repurchase Its Shares of Common Stock

TOKYO — Pioneer Corporation has announced that, at the meeting of its board of directors held on March 11, 2005, it resolved to repurchase its shares of common stock as follows, pursuant to the provisions of Article 211-3, Paragraph 1, Item 2 of the Commercial Code of Japan.

Description

References (Information as of September 30, 2004):

#           #           #           #           #          #

For further information, please contact:
Hideki Okayasu
Senior Executive Officer and General Manager, Finance and Accounting Division
Pioneer Corporation, Tokyo
Phone: +81-3-3494-1111 / Fax: +81-3-3495-4431
E-mail: pioneer_shr@post.pioneer.co.jp
Website: http://www.pioneer.co.jp/corp/ir/index-e.html