~~Table~~UNITED ofSTATES SECURITIES ~~Contents~~AND EXCHANGE COMMISSION

~~UNITED~~Washington, ~~STATES SECURITIES~~D.C. ~~AND EXCHANGE COMMISSION~~20549

~~Washington,~~FORM ~~D.C. 20549~~6-K

~~FORM~~REPORT 6OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-K16 OR 15D-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

~~REPORT~~For OFthe ~~FOREIGN~~month ~~PRIVATE~~of ~~ISSUER PURSUANT~~November, ~~TO RULE 13A-16 OR 15D-16~~2005 ~~UNDER THE SECURITIES EXCHANGE ACT OF 1934~~

~~For~~Commission ~~the~~File ~~month~~Number ~~of July, 2005~~1-7616

~~Commission~~PIONEER ~~File Number 1-7616~~CORPORATION

~~PIONEER~~(Translation ~~CORPORATION~~ of registrant’s name into English)

4-1, MEGURO 1-CHOME, MEGURO-KU, TOKYO 153-8654, JAPAN (~~Translation~~Address of ~~registrant’s~~principal ~~name~~executive ~~into English~~offices)

~~4-1,~~Indicate ~~MEGURO~~by ~~1-CHOME,~~check ~~MEGURO-KU,~~mark ~~TOKYO~~whether ~~153-8654,~~the ~~JAPAN (Address~~registrant offiles ~~principal~~or ~~executive~~will ~~offices)~~file annual reports under cover Form 20-F or Form 40-F:

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

Indicate by check mark if the registrant is submitting the Form 20 6-FK ~~þ Form~~in paper as permitted by Regulation 40S-FT Rule 101(b)(1): 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)(17): o

Indicate by check mark ifwhether by furnishing the ~~registrant~~information iscontained ~~submitting~~in ~~the~~this Form, ~~6-K~~the inregistrant is ~~paper~~also asthereby ~~permitted~~furnishing ~~by Regulation S-T~~the information to the Commission pursuant to Rule ~~101~~12g3-2(b)~~(7):~~ ounder the Securities Exchange Act of 1934.

~~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~~Yes ~~12g3-2(b) under the~~o No þ ~~Securities Exchange Act of 1934.~~

If “Yes” ~~o No~~is þmarked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-

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

~~TABLE~~Pursuant OFto ~~CONTENTS~~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.

SIGNATURES Pioneer Announces First-Quarter Results for Fiscal 2006


	PIONEER CORPORATION (Registrant)
Date: November 21, 2005
	By	/s/ Kaneo Ito
		Kaneo Ito
		President and Representative Director

~~Table~~This ofreport ~~Contents~~on Form 6-K contains the followings:

~~SIGNATURES~~ 1. The announcement released by the Company to the press in Japan dated November 21, 2005, that Mr. Tamihiko Sudo, currently Executive Vice President and Representative Director, will become President and Representative Director, effective as of January 1, 2006.

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

	PIONEER CORPORATION (Registrant)
Date: July 28, 2005	By	/s/ Kaneo Ito
		Kaneo Ito President and Representative Director

Management Change at Pioneer Corporation

~~This~~November 21, ~~report~~2005, Tokyo, Japan — The board of directors of Pioneer Corporation, at its meeting held on ~~Form~~November 21, ~~6-K~~2005, ~~contains~~resolved ~~the~~to ~~followings:~~appoint Mr. Tamihiko Sudo, currently Executive Vice President and Representative Director, as its new President and Representative Director, effective as of January 1, 2006.

1Mr. Kanya ~~The~~Matsumoto, ~~announcement~~currently ~~released~~Chairman byand ~~the~~Representative ~~Company~~Director, toand ~~the~~Mr. Kaneo ~~press~~Ito, incurrently President ~~Japan~~and ~~dated~~Representative ~~July 28 2005~~Director, ~~concerning~~will ~~its~~assume ~~consolidated~~the ~~first-quarter~~office ~~business~~of ~~results~~Director ~~for~~and ~~the~~Advisor, respectively, ~~period~~effective ~~ended June 30~~January 1, ~~2005~~2006.

~~Table~~This change in management is an indication of ~~Contents~~their assuming responsibility for the steep decline in Pioneer’s financial performance due to the smaller-than-planned number of units sold of plasma displays and DVD recorders, both strategic products.

~~For~~Mr. Sudo ~~Immediate~~has ~~Release~~held ~~July~~various 28top executive posts, ~~2005~~including president of Pioneer’s Mobile Entertainment Company (MEC) and Pioneer’s overseas subsidiary. He has a wealth of experience in managerial methods, and was project leader when MEC won the Japan Quality Award.

Under his new leadership, Pioneer ~~Announces~~Corporation ~~First-Quarter~~will ~~Results~~expedite ~~for~~restructuring ~~Fiscal~~of ~~2006~~operations and seek to improve its business performance as soon as possible.

~~TOKYO —~~ Pioneer Corporation ~~today~~is ~~announced~~one ~~its~~of ~~consolidated~~the ~~first-quarter~~leading manufacturers of consumer and business-use ~~results~~electronics ~~for~~products such as audio, video and car electronics on a global scale. Its shares are traded on the New ~~period~~York ~~ended~~Stock ~~June 30~~Exchange (ticker symbol PIO), ~~2005~~Euronext Amsterdam, Tokyo Stock Exchange, and Osaka Securities Exchange.

~~Consolidated Financial Highlights~~# # #

	(In millions of yen except per share information)
	Three months ended June 30
						% to
						prior
	2005			2004		year
Operating revenue	¥	164,183		¥	163,487		100.4	%
Operating income (loss)		(8,869	)		5,012		—
Income (loss) before income taxes		(6,609	)		4,239		—
Net income (loss)	¥	(5,343	)	¥	1,497		—
Net income (loss) per share:
Basic	¥	(30.63	)	¥	8.53
Diluted	¥	(30.63	)	¥	7.46

For further information, please contact:
Public Relations
Pioneer Corporation, Tokyo, Japan
Phone: +81-3-3495-9885
E-mail: pioneer_prd@post.pioneer.co.jp
Website: http://www.pioneer.co.jp

~~Note:~~Profile ~~Effective~~of ~~from~~Mr. Tamihiko ~~fiscal~~Sudo As ~~2005 year-end presentation, the Company classified gains and losses on sale and disposal~~ of ~~fixed~~Jan. ~~assets~~1, ~~which were previously included in “Operating costs and expenses,” into “Other income (expenses).” Previously reported amounts have been reclassified accordingly.~~2006

~~-1-~~President and Representative Director (currently Executive Vice President and Representative Director)


Date of Birth:		April 28, 1947
Place of Birth:		Gunma Prefecture, Japan
Education:		In March 1970, graduated from the College of Social Relations, Rikkyo University

Business Career:
Apr. 1970		Joined Pioneer Corporation (PEC)
Jan. 1977		Moved to Pioneer Electronic (Europe) NV
Mar. 1988		General Manager, Europe Dept, International Div, PEC
Feb. 1989		Managing Director, Pioneer Electronic (Holland) NV
Apr. 1994		General Manager, Product Planning Dept., Car Electronics Div., PEC
Feb. 1996		General Manager, Car Electronics Div., PEC
Jul. 1997		General Manager, Product Planning Div., Mobile Entertainment Company, PEC
Mar. 2000		Vice President of Mobile Entertainment Company, PEC
Jun. 2000		Executive Officer and Vice President of Mobile Entertainment Company, PEC
Jun. 2002		Senior Executive Officer, and Vice President of Mobile Entertainment Company, PEC
Jun. 2003		Managing Director, and Vice President of Mobile Entertainment Company, PEC
Jun. 2004		Senior Managing Director and Representative Director, and Vice President of Mobile Entertainment Company, PEC
Jun. 2005		Executive Vice President and Representative Director, PEC (In charge of corporate strategy planning, corporate management, export management in general, and quality control in general)

Consolidated Business Results For the first quarter of fiscal 2006, ended June 30, 2005, consolidated operating revenue was ¥164,183 million (US$1,479.1 million), approximately the same as the corresponding period of the previous year. Operating loss, however, was ¥8,869 million (US$79.9 million), compared with operating income of ¥5,012 million for the corresponding period of the previous year and net loss amounted to ¥5,343 million (US$48.1 million), compared with net income of ¥1,497 million for the corresponding period of the previous year. The average value of the yen was up 1.9% against the U.S. dollar and down 2.4% against the euro from the corresponding period in the previous year.

Home Electronics sales increased 13.4% from the corresponding period in the previous year to ¥63,205 million (US$569.4 million). In Japan, sales increased by 19.3% to ¥17,040 million (US$153.5 million), primarily due to an increase in sales of plasma displays, reflecting the expansion of our OEM (original equipment manufacturing) sales caused by the acquisition of a new subsidiary last autumn, despite the decrease in sales of DVD recorders. Overseas sales increased 11.3% to ¥46,165 million (US$415.9 million), due to a worldwide rise in sales of plasma displays, and in Asia of DVD drives for personal computers, despite a decline in sales of audio products in Europe and Asia.

Car Electronics sales amounted to ¥82,213 million (US$740.7 million), up 3.3% over the corresponding period in the previous year. In Japan, sales decreased 7.4% to ¥29,941 million (US$269.7 million), due to a decrease in sales of car navigation systems to automobile manufacturers, which resulted from the lack of new car model launches compared with the corresponding period of the previous year, despite increased sales of such systems to consumer markets. Overseas sales increased 10.7% to ¥52,272 million (US$470.9 million), due to growth in sales of car audio products to automobile manufacturers in North America and consumer markets in Central and South America and Europe; and higher sales of car navigation systems in North America.

Royalty revenue from Patent Licensing decreased 60.9% from the corresponding period in the previous year to ¥1,123 million (US$10.1 million), reflecting the expiration of patents included in a portfolio of patents licensed to the optical disc industry and the lack of revenue from renewed contracts with licensees compared with the corresponding period of the previous year.

Others sales decreased 30.3% from the corresponding period in the previous year to ¥17,642 million (US$158.9 million). In Japan, sales decreased 30.9% to ¥8,442 million (US$76.1 million) reflecting a sales shift from Japan to China of devices for cellular phones and a decrease in sales of organic light-emitting diode (OLED) display panels.

-2-

Overseas, sales decreased 29.7% to ¥9,200 million (US$82.9 million), due to a drop in sales of optical disc manufacturing systems in Asia, despite the increase in sales of devices for cellular phones in China.

Operating loss was ¥8,869 million (US$79.9 million) compared with operating income of ¥5,012 million for the corresponding period of the previous year. The loss resulted mainly from decreased gross profit margins due to the continuing decline in market prices of our major products. Net loss amounted to ¥5,343 million (US$48.1 million) compared with net income of ¥1,497 million for the corresponding period of the previous year.

Cash Flows Net cash used in operating activities for the first quarter ended June 30, 2005 was ¥1,060 million (US$9.5 million), compared with ¥5,676 million used in the corresponding period of the previous year. Although net loss of ¥5,343 million was posted this quarter, collection of accounts receivable increased, and resulted in less cash used in operating activities. Net cash used in investing activities was ¥4,924 million (US$44.4 million), compared with ¥13,283 million used in the corresponding period of the previous year. The difference resulted from decreased investment in production facilities as well as proceeds from sales of investment securities. Net cash provided by financing activities was ¥2,830 million (US$25.5 million), compared with ¥6,365 million used in the corresponding period of the previous year.

Business Forecasts for Fiscal 2006 Our consolidated business forecasts for fiscal 2006, ending March 31, 2006, are unchanged from those announced on April 27, 2005, which are shown below. We assume average yen-U.S. dollar and yen-euro exchange rates for the remaining period of fiscal 2006 of ¥105 and ¥135, respectively.

			(In millions of yen)
	Projections for			Results for			Percent
	fiscal 2006			fiscal 2005			changes
Operating revenue	¥	810,000		¥	733,648			+10.4	%
Operating income		8,000			2,592			+208.6	%
Income (loss) before income taxes		7,500			(187	)		—
Net income (loss)	¥	1,000		¥	(8,789	)		—

Cautionary Statement with Respect to Forward-Looking Statements Statements made in this release with respect to our current plans, estimates, strategies and beliefs, and other statements that are not historical facts are forward-looking statements about our future performance. These statements are based on management’s assumptions and beliefs

-3-

in light of the information currently available to it. We caution that a number of important risks and uncertainties could cause actual results to differ materially from those discussed in the forward-looking statements, and therefore you should not place undue reliance on them. You also should not believe that it is our obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. We disclaim any such obligation. Risks and uncertainties that might affect us include, but are not limited to, (i) general economic conditions in our markets, particularly levels of consumer spending; (ii) exchange rates, particularly between the yen and the U.S. dollar, euro, and other currencies in which we make significant sales or in which our assets and liabilities are denominated; (iii) our ability to continue to design and develop and win acceptance of our products and services, which are offered in highly competitive markets characterized by continual new product introductions, rapid developments in technology and subjective and changing consumer preferences; (iv) our ability to successfully implement our business strategies; (v) our ability to compete, and develop and implement successful sales and distribution strategies in light of technological developments in and affecting our businesses; (vi) our continued ability to devote sufficient resources to research and development, and capital expenditure; (vii) our ability to continuously enhance our brand image; (viii) the success of our joint ventures and alliances; and (ix) the outcome of contingencies.

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.

# # # # # #

The U.S. dollar amounts in this release represent translation of Japanese yen, for convenience only, at the rate of ¥111=US$1.00, the approximate rate prevailing on June 30, 2005.

Attached are consolidated financial statements for the three months ended June 30, 2005.

For further information, please contact: Investor Relations Department, Corporate Branding and Communications Division Pioneer Corporation, Tokyo Phone: +81-3-3495-6774 / Fax: +81-3-3495-4301 E-mail: pioneer_ir@post.pioneer.co.jp IR Website: http://www.pioneer.co.jp/ir-e/

-4-

Pioneer Corporation and Subsidiaries

(1) OPERATING REVENUE BY SEGMENT

(In millions of yen)

	Three months ended June 30
	2005					2004
											% to
	Amount		% to total			Amount		% to total			prior year
Domestic	¥	17,040		10.4	%	¥	14,285		8.7	%		119.3	%
Overseas		46,165		28.1			41,468		25.4			111.3
Home Electronics		63,205		38.5			55,753		34.1			113.4
Domestic		29,941		18.2			32,331		19.8			92.6
Overseas		52,272		31.9			47,224		28.9			110.7
Car Electronics		82,213		50.1			79,555		48.7			103.3
Domestic		—		—			—		—			—
Overseas		1,123		0.7			2,875		1.8			39.1
Patent Licensing		1,123		0.7			2,875		1.8			39.1
Domestic		8,442		5.2			12,223		7.5			69.1
Overseas		9,200		5.5			13,081		7.9			70.3
Others		17,642		10.7			25,304		15.4			69.7
Domestic		55,423		33.8			58,839		36.0			94.2
Overseas		108,760		66.2			104,648		64.0			103.9
Total	¥	164,183		100.0	%	¥	163,487		100.0	%		100.4	%

(2) CONSOLIDATED STATEMENTS OF OPERATIONS

(In millions of yen)

	Three months ended June 30
							% to
	2005			2004			prior year
Operating revenue:
Net sales	¥	163,060		¥	160,612			101.5	%
Royalty revenue		1,123			2,875			39.1
Total operating revenue		164,183			163,487			100.4
Operating costs and expenses:
Cost of sales		130,213			117,277			111.0
Selling, general and administrative expenses		42,839			41,198			104.0
Total operating costs and expenses		173,052			158,475			109.2
Operating income (loss)		(8,869	)		5,012			—
Other income (expenses):
Interest income		627			358			175.1
Foreign exchange loss		(742	)		(933	)		79.5
Interest expense		(395	)		(374	)		105.6
Other—net		2,770			176			1,573.9
Total other income (expenses)		2,260			(773	)		—
Income (loss) before income taxes		(6,609	)		4,239			—
Income taxes		(1,552	)		1,607			—
Minority interest in losses (earnings) of subsidiaries		567			(290	)		—
Equity in losses of affiliated companies		(853	)		(845	)		100.9
Net income (loss)	¥	(5,343	)	¥	1,497			—	%

Pioneer Corporation and Subsidiaries

(3) CONSOLIDATED BALANCE SHEETS

(In millions of yen)

	June 30									March 31
							Increase/						Increase/
	2005			2004			(Decrease)			2005			(Decrease)
ASSETS
Current assets:
Cash and cash equivalents	¥	114,770		¥	168,962		¥	(54,192	)	¥	116,681		¥	(1,911	)
Trade receivables, less allowance		109,699			104,629			5,070			132,176			(22,477	)
Inventories		125,968			127,499			(1,531	)		109,015			16,953
Others		73,627			66,794			6,833			69,024			4,603
Total current assets		424,064			467,884			(43,820	)		426,896			(2,832	)
Investments and long-term receivables		24,593			33,267			(8,674	)		28,828			(4,235	)
Property, plant and equipment, less depreciation		205,477			160,512			44,965			210,145			(4,668	)
Intangible assets		22,804			18,270			4,534			24,052			(1,248	)
Other assets		37,870			35,208			2,662			35,246			2,624
Total assets	¥	714,808		¥	715,141		¥	(333	)	¥	725,167		¥	(10,359	)
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Short-term borrowings and current portion of long-term debt	¥	58,437		¥	23,732		¥	34,705		¥	52,428		¥	6,009
Trade payables		98,285			87,776			10,509			96,335			1,950
Others		88,260			97,803			(9,543	)		102,407			(14,147	)
Total current liabilities		244,982			209,311			35,671			251,170			(6,188	)
Long-term debt		80,357			89,563			(9,206	)		81,219			(862	)
Other long-term liabilities		42,458			58,938			(16,480	)		42,371			87
Minority interests		17,691			18,077			(386	)		18,168			(477	)
Shareholders’ equity:
Common stock		49,049			49,049			—			49,049			—
Capital surplus		82,797			82,549			248			82,735			62
Retained earnings		255,213			275,215			(20,002	)		260,556			(5,343	)
Accumulated other comprehensive income (loss)		(45,306	)		(57,094	)		11,788			(47,669	)		2,363
Treasury stock		(12,433	)		(10,467	)		(1,966	)		(12,432	)		(1	)
Total shareholders’ equity		329,320			339,252			(9,932	)		332,239			(2,919	)
Total liabilities and shareholders’ equity	¥	714,808		¥	715,141		¥	(333	)	¥	725,167		¥	(10,359	)
Breakdown of accumulated other comprehensive income (loss):
Minimum pension liability adjustments	¥	(11,255	)	¥	(22,315	)	¥	11,060		¥	(11,186	)	¥	(69	)
Net unrealized holding gain on securities		6,499			9,296			(2,797	)		8,250			(1,751	)
Cumulative foreign currency translation adjustments		(40,550	)		(44,075	)		3,525			(44,733	)		4,183
Total accumulated other comprehensive income (loss)	¥	(45,306	)	¥	(57,094	)	¥	11,788		¥	(47,669	)	¥	2,363

Pioneer Corporation and Subsidiaries

(4) CONSOLIDATED STATEMENTS OF CASH FLOWS

(In millions of yen)

	Three months ended June 30
	2005			2004
I. Operating activities:
Net income (loss)	¥	(5,343	)	¥	1,497
Depreciation and amortization		12,547			10,509
Decrease in trade receivables		22,878			8,609
Increase in inventories		(16,031	)		(18,808	)
Increase in trade payables		2,409			7,244
Decrease in other accrued liabilities		(8,085	)		(12,730	)
Other		(9,435	)		(1,997	)
Net cash used in operating activities		(1,060	)		(5,676	)
II. Investing activities:
Payment for purchase of fixed assets		(8,927	)		(13,638	)
Other		4,003			355
Net cash used in investing activities		(4,924	)		(13,283	)
III. Financing activities:
Increase (decrease) in short-term borrowings and long-term debt		6,049			(4,069	)
Dividends paid		(2,180	)		(2,193	)
Other		(1,039	)		(103	)
Net cash provided by (used in) financing activities		2,830			(6,365	)
Effect of exchange rate changes on cash and cash equivalents		1,243			1,867
Net decrease in cash and cash equivalents		(1,911	)		(23,457	)
Cash and cash equivalents, beginning of period		116,681			192,419
Cash and cash equivalents, end of period	¥	114,770		¥	168,962
Free cash flow (I + II)	¥	(5,984	)	¥	(18,959	)

Pioneer Corporation and Subsidiaries

(5) SEGMENT INFORMATION

The following segment information is prepared pursuant to the regulations under the Securities and Exchange Law of Japan.

(In millions of yen)

	Three months ended June 30
	2005						2004						% to prior year
	Operating			Operating			Operating			Operating			Operating			Operating
	Revenue			Income			Revenue			Income			Revenue			Income
Home Electronics	¥	63,508		¥	(12,428	)	¥	56,383		¥	(4,322	)		112.6	%		—	%
Car Electronics		82,608			5,314			79,601			6,316			103.8			84.1
Patent Licensing		1,123			371			3,262			2,749			34.4			13.5
Others		27,639			(754	)		33,368			1,048			82.8			—
Total		174,878			(7,497	)		172,614			5,791			101.3			—
Corporate and Eliminations		(10,695	)		(1,372	)		(9,127	)		(779	)		—			—
Consolidated	¥	164,183		¥	(8,869	)	¥	163,487		¥	5,012			100.4	%		—	%

Notes:
1.		The Company’s consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America.
2.		The consolidated financial statements include the accounts of the parent company and 125 subsidiaries and the investments in 5 affiliated companies accounted for on an equity basis.
3.		Effective from fiscal 2005 year-end presentation, operating income is presented as net sales less cost of sales, selling, general and administrative expenses in order to be consistent with generally accepted financial reporting practice in Japan. The Company believes that such presentation is useful for comparison of the Company’s financial results with those of other Japanese companies. Under the U.S. GAAP, business restructuring expenses and losses on impairment of long-lived assets as well as gains and losses on sale and disposal of fixed assets included in “Other—net” are included in operating income. Previously reported amounts in consolidated statements of operations and segment information have been reclassified accordingly.
4.		Effective from this first quarter, the Company changed business segment classification for certain businesses. Results related to plasma displays for business use and DJ equipment have been moved from “Others” to “Home Electronics.” Corresponding figures for the previously reported operating revenue by segment and segment information have been reclassified accordingly.

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