SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF

THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2018

ORIX Corporation

(Translation of Registrant’s Name into English)

World Trade Center Bldg., 2-4-1 Hamamatsu-cho, Minato-Ku, Tokyo, JAPAN

(Address of Principal Executive Offices)

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

Form 20-F   ☒        Form 40-F  ☐

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

Yes  ☐        No  ☒

Table of Documents Filed

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.

Consolidated Financial Results

April 1, 2018 – September 30, 2018

October 26, 2018

In preparing its consolidated financial information, ORIX Corporation (the “Company”) and its subsidiaries have complied with generally accepted accounting principles in the United States of America.

These documents may contain forward-looking statements about expected future events and financial results that involve risks and uncertainties. Such statements are based on our current expectations and are subject to uncertainties and risks that could cause actual results to differ materially from those described in the forward-looking statements. Factors that could cause such a difference include, but are not limited to, those described under “Risk Factors” in the Company’s annual report on Form 20-F filed with the United States Securities and Exchange Commission.

The Company believes that it may have been a “passive foreign investment company” for U.S. federal income tax purposes in the year to which these consolidated financial results relate by reason of the composition of its assets and the nature of its income. In addition, the Company may be a PFIC for the foreseeable future. Assuming that the Company is a PFIC, a U.S. holder of the shares or ADSs of the Company will be subject to special rules generally intended to eliminate any benefits from the deferral of U.S. federal income tax that a holder could derive from investing in a foreign corporation that does not distribute all of its earnings on a current basis. Investors should consult their tax advisors with respect to such rules, which are summarized in the Company’s annual report.

For further information please contact:

Investor Relations

ORIX Corporation

World Trade Center Building, 2-4-1 Hamamatsu-cho, Minato-ku, Tokyo 105-6135

JAPAN

Tel: +81-3-3435-3121 Fax: +81-3-3435-3154

E-mail: orix_corpcomm@orix.jp

Consolidated Financial Results from April 1, 2018 to September 30, 2018

(U.S. GAAP Financial Information for ORIX Corporation and its Subsidiaries)

1. Performance Highlights as of and for the Six Months Ended September 30, 2018

(1) Performance Highlights - Operating Results (Unaudited)

(millions of yen)*1

“Comprehensive Income Attributable to ORIX Corporation Shareholders” was ¥167,820 million for the six months ended September 30, 2018 (year-on-year change was a 7.0% decrease) and ¥180,526 million for the six months ended September 30, 2017 (year-on-year change was a 108.3% increase).

(2) Performance Highlights - Financial Position (Unaudited)

“Shareholders’ Equity Ratio” is the ratio of “Total ORIX Corporation Shareholders’ Equity” to “Total Assets.”

2. Dividends (Unaudited)

3. Targets for the Year Ending March 31, 2019 (Unaudited)

In order to facilitate a better understanding of our medium- and long- term growth projections by our shareholders and potential investors, we decided to include our medium-term strategic directions in this document. For details, refer to “1.Summary of Consolidated Financial Results (3) Medium-Term Strategic Directions FY2019-2021” on page 9.

4. Other Information

(4) Number of Issued Shares (Ordinary Shares)

1. The number of issued shares, including treasury stock, was 1,324,629,128 as of September 30, 2018, and 1,324,495,728 as of March 31, 2018.

2. The number of treasury stock was 42,843,573 as of September 30, 2018, and 42,843,413 as of March 31, 2018.

3. The average number of outstanding shares was 1,280,070,926 for the six months ended September 30, 2018, and 1,282,566,866 for the six months ended September 30, 2017.

The Company’s shares held through the Board Incentive Plan Trust (1,823,993 shares as of September 30, 2018 and 1,651,443 shares as of March 31, 2018) are not included in the number of treasury stock as of the end of the periods, but are included in the average number of shares outstanding as treasury stock shares that are deducted from the basis of the calculation of per share data.

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1. Summary of Consolidated Financial Results

(1) Financial Highlights

Financial Results for the Six Months Ended September 30, 2018

Overview of Business Performance (April 1, 2018 to September 30, 2018)

Total revenues for the six months ended September 30, 2018 (hereinafter, “the second consolidated period”) decreased 17% to ¥1,262,014 million compared to ¥1,517,796 million during the same period of the previous fiscal year. Operating leases increased due to an increase in gains on sales of real estate under operating leases. In addition, services income increased due primarily to large gains from sales of property under facility operations, and an increase in service revenues generated by subsidiaries in the principal investment business. On the other hand, sales of goods and real estate decreased due primarily to a decrease in related revenues generated by a subsidiary in the principal investment business which recognized significant demand during the same period of the previous fiscal year. In addition, despite an increase in life insurance premiums in line with an increase in policies in force, life insurance premiums and related investment income decreased due to a decrease in investment income from assets under variable annuity and variable life insurance contracts, as compared to the same period of the previous fiscal year during which market conditions had improved significantly.

Total expenses decreased 20% to ¥1,066,920 million compared to ¥1,328,769 million during the same period of the previous fiscal year. Costs of operating leases and services expense increased in line with the aforementioned increase in revenues. Costs of goods and real estate sold decreased in line with the aforementioned decrease in revenues. In addition, life insurance costs decreased due to a decrease in a provision of liability reserve, despite the aforementioned increase in policies in force.

Equity in net income of affiliates decreased mainly due to the recognition of significant gains on sales of investments in real estate joint ventures during to the same period of the previous fiscal year, and the recognition of losses in an affiliate in India during the second consolidated period.

As a result of the foregoing, income before income taxes for the second consolidated period decreased 13% to ¥220,945 million compared to ¥252,612 million during the same period of the previous fiscal year, and net income attributable to ORIX Corporation shareholders decreased 7% to ¥155,050 million compared to ¥165,970 million during the same period of the previous fiscal year.

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Segment Information

Total segment profits for the second consolidated period decreased 11% to ¥223,316 million compared to ¥249,750 million during the same period of the previous fiscal year. Segment profits increased in Maintenance Leasing, Real Estate and Retail segments, while segment profits decreased in Corporate Financial Services, Investment and Operation and Overseas Business segments.

Segment information for the second consolidated period is as follows:

Corporate Financial Services Segment: Loan, leasing and fee business

Segment revenues decreased 6% to ¥51,067 million compared to ¥54,059 million during the same period of the previous fiscal year due to a decrease in finance revenues in line with decreases in average investment balances of direct financing leases and installment loans and a decrease in gains on sales of securities, despite an increase in services income resulting from our stable fee businesses provided to domestic small- and medium-sized enterprise customers.

Segment expenses decreased due to a decrease in selling, general and administrative expenses.

As a result of the foregoing and due to the recognition of gains on sales of affiliates during the same period of the previous fiscal year, segment profits decreased 24% to ¥16,788 million compared to ¥22,049 million during the same period of the previous fiscal year.

Segment assets decreased 3% to ¥966,357 million compared to the end of the previous fiscal year due to decreases in investment in direct financing leases and installment loans despite an increase in investment in securities.

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Maintenance Leasing Segment: Automobile leasing and rentals, car-sharing, and test and measurement instruments and IT-related equipment rentals and leasing

Segment revenues increased 3% to ¥141,642 million compared to ¥137,156 million during the same period of the previous fiscal year due to an increase in operating leases revenues.

Segment expenses increased in line with the aforementioned revenue increase.

As a result of the foregoing, segment profits increased 1% to ¥20,583 million compared to ¥20,438 million during the same period of the previous fiscal year.

Segment assets increased 1% to ¥859,007 million compared to the end of the previous fiscal year due to an increase of new executions in investment in operating leases.

Real Estate Segment: Real estate development and rental, facility operation, REIT asset management, and real estate investment and advisory services

Segment revenues increased 19% to ¥113,527 million compared to ¥95,755 million during the same period of the previous fiscal year due to increases in services income from facilities operations which resulted from sales of property under facility operations and in operating leases revenues in line with an increase in gains on sales of rental property.

Segment expenses decreased due to a decrease in write-downs of long-lived assets.

As a result of the foregoing and a decrease in equity in net income of affiliates due to significant gains on sales of investments in real estate joint ventures that were recognized during the same period of the previous fiscal year, segment profits were ¥44,183 million, a slight increase over the ¥43,991 million recorded during the same period of the previous fiscal year.

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Segment assets decreased 7% to ¥577,414 million compared to the end of the previous fiscal year due primarily to sales of property under facility operations and rental properties.

Investment and Operation Segment: Environment and energy, principal investment, loan servicing (asset recovery), and concession

Segment revenues decreased 36% to ¥499,007 million compared to ¥774,474 million during the same period of the previous fiscal year due to decreases in sales of goods by a subsidiary in the principal investment business which recognized significant demand during the same period of the previous fiscal year.

Segment expenses decreased compared to the same period of the previous fiscal year in line with the aforementioned revenues decreases.

As a result of the foregoing and the recognition of significant gains on sales of shares of a subsidiary during the same period of the previous fiscal year, segment profits decreased 36% to ¥24,871 million compared to ¥38,927 million during the same period of the previous fiscal year.

Segment assets increased 4% to ¥893,067 million compared to the end of the previous fiscal year due primarily to increases in inventories and property under facility operations in the environment and energy business.

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Retail Segment: Life insurance, banking and card loan

Segment revenues increased 1% to ¥221,735 million compared to ¥219,505 million during the same period of the previous fiscal year due to increases in life insurance premiums in line with an increase in policies in force and in finance revenues in the banking business, which was partially offset by a decrease in investment income from assets under variable annuity and variable life insurance contracts because of the significant market improvement that had occurred during the same period of the previous fiscal year.

Segment expenses decreased due to a decrease in life insurance costs as a provision of liability reserve declined.

As a result of the foregoing, segment profits increased 14% to ¥49,175 million compared to ¥42,950 million during the same period of the previous fiscal year.

Segment assets increased 6% to ¥3,368,956 million compared to the end of the previous fiscal year due primarily to an increase in investment in securities in the life insurance business and an increase in installment loans in the banking business, despite the surrender of variable annuity and variable life insurance contracts.

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Overseas Business Segment: Leasing, loan, bond investment, asset management and aircraft- and ship-related operations

Segment revenues decreased 1% to ¥238,763 million compared to ¥240,242 million during the same period of the previous fiscal year mainly due to a decrease in sales of goods and real estate because of sales of shares of subsidiaries, despite increases in finance revenues and operating leases.

Segment expenses increased due to an increase in selling, general and administrative expenses.

As a result of the foregoing and a decrease in equity in net income of affiliates due to the recognition of losses in an affiliate in India, segment profits decreased 17% to ¥67,716 million compared to ¥81,395 million in the same period of the previous fiscal year.

Segment assets increased 13% to ¥2,955,727 million compared to the end of the previous fiscal year due primarily to an increase in installment loans because of an acquisition of loan and asset management company in the Americas and an increase in investment in operating leases of aircraft-related operations.

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(2) Consolidated Financial Condition

Summary of Assets, Liabilities, Shareholders’ Equity

Total assets increased 3% to ¥11,778,544 million compared to ¥11,425,982 million at the end of the previous fiscal year. Installment loans increased due primarily to the acquisition of a loan and asset management company in the Americas. Investment in securities increased due primarily to the purchase of investment in securities in the life insurance business. Segment assets increased 6% to ¥9,620,528 million compared to the end of the previous fiscal year.

Due to assets increase, long-term debt and short-term debt, and deposits in liabilities increased compared to the end of the previous fiscal year.

Shareholders’ equity increased 5% to ¥2,803,969 million compared to the end of the previous fiscal year due primarily to an increase in retained earnings.

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(3) Medium-Term Strategic Directions FY2019-2021

ORIX Group manages its business portfolio by dividing it into six segments: Corporate Financial Services, Maintenance Leasing, Real Estate, Investment and Operation, Retail, and Overseas Business. Furthermore, taking risk and capital requirements into account, ORIX Group categorizes these six segments into three categories: “Finance,” “Operation” and “Investment” to describe its mid-term strategic directions.

The “Finance” business is ORIX Group’s customer base and source of information. However, given that the low interest rate environment makes growth difficult in the financial business, ORIX Group will continue to focus on “Operation” and “Investment” to grow stable earnings and will proactively enter new markets to nurture its next core businesses.

The “Operation” business for which operational risk is taken by ORIX Group is positioned as ORIX Group’s growth driver and source for new and stable earnings. ORIX Group will engage in M&A and expand new investment with a focus on the environment and energy business, asset management business, concession business and life insurance business as well as other new business areas coming from the change in society and the market.

The “Investment” business provides ORIX Group with opportunities to develop new businesses. ORIX Group focuses mainly on private equity businesses in Japan and overseas, aircraft- and ship-related operations and will expand the scale of those businesses.

From the fiscal year ending March 31, 2019, ORIX Group aims to achieve annual net income attributable to ORIX Corporation shareholders growth of between 4% and 8%, and to maintain ROE above 11%.

Although forward-looking statements in this document are attributable to current information available to ORIX Corporation and are based on assumptions deemed reasonable by ORIX Corporation, actual financial results may differ materially due to various factors. Readers are urged not to place undue reliance on such forward-looking statements.

Factors causing a result that differs from forward-looking statements include, but are not limited to, those described under “Risk Factors” in our Form 20-F submitted to the U.S. Securities and Exchange Commission.

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2. Financial Information

(1) Condensed Consolidated Balance Sheets (Unaudited)

(millions of yen)

- 10 -

- 11 -

(2) Condensed Consolidated Statements of Income (Unaudited)

(millions of yen)

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(3) Condensed Consolidated Statements of Comprehensive Income (Unaudited)

(4) Assumptions for Going Concern

There is no corresponding item.

(5) Significant Changes in Shareholders’ Equity

There is no corresponding item.

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(6) Changes in Accounting Policies

(Adoption of New Accounting Standards)

In May 2014, Accounting Standards Update 2014-09 (“Revenue from Contracts with Customers”—ASC 606 (“Revenue from Contracts with Customers”)) was issued, and related amendments were issued thereafter. The core principle of these Updates requires that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company and its subsidiaries adopted these Updates on April 1, 2018, using the cumulative-effect method, for only those contracts that are not completed at the date of initial adoption. The adoption primarily resulted in changes in the timing of revenue recognition for performance fees received from customers regarding asset management business, and certain project-based orders in real estate business for which the Company and its subsidiaries currently apply the percentage-of-completion or completed contract method. The effect of adopting these Updates on the Company and its subsidiaries’ financial position at the adoption was mainly an increase of ¥405 million in retained earnings in the consolidated balance sheets.

In January 2016, Accounting Standards Update 2016-01 (“Recognition and Measurement of Financial Assets and Financial Liabilities”—ASC 825-10 (“Financial Instruments—Overall”)) was issued. This Update requires an entity to measure equity investments at fair value, and requires recognizing the changes in fair value through earnings or using alternative method that requires carrying value to be adjusted by subsequent observable transactions. Additionally, this Update revises the presentation of certain fair value changes for financial liabilities measured at fair value. The Company and its subsidiaries adopted this Update on April 1, 2018. The effect of adopting this Update on the Company and its subsidiaries’ financial position at the adoption date was mainly a decrease of ¥2,899 million in accumulated other comprehensive income and an increase of ¥2,899 million in retained earnings in the consolidated balance sheets, due to reclassification of unrealized changes in fair value of equity investments from accumulated other comprehensive income to retained earnings, and reclassification of changes in fair value of financial liabilities resulting from a change in the instrument-specific credit risk when the Company and its subsidiaries have elected to measure the liabilities at fair value in accordance with the fair value option, from retained earnings to accumulated other comprehensive income.

In October 2016, Accounting Standards Update 2016-16 (“Intra-Entity Transfers of Assets Other Than Inventory”—ASC 740 (“Income Taxes”)) was issued. This Update eliminates the exception to defer the income tax consequences of intra-entity transfers of assets other than inventory until the assets are ultimately sold to an outside party and requires the recognition of the current and deferred tax consequences when those transfers occur. The Company and its subsidiaries adopted this Update on April 1, 2018. The effect of adopting this Update on the Company and its subsidiaries’ financial position at the adoption date was mainly an increase of ¥3,772 million in retained earnings in the consolidated balance sheets.

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(7) Segment Information (Unaudited)

1. Segment Information by Sector

2. Geographic Information

(8) Subsequent Events

There are no material subsequent events.

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Announcement Regarding Revision of Dividend Policy, Interim Dividend and Year End Dividend Forecast for the Fiscal Year Ending March 31, 2019

TOKYO, Japan — October 26, 2018 — ORIX Corporation (“ORIX”) announced that the Board of Directors, at a meeting held today, resolved the revision of the dividend policy, the interim dividend for the fiscal year ending March 31, 2019(“FY2019.3”) and the year-end dividend forecast for the FY2019.3 as follows:

To enhance the returns to shareholders, ORIX decided to raise the dividend payout ratio from 27%, that was expected earlier, to 30% from the FY2019.3.

ORIX will continue to distribute dividends in consideration of the optimal balance of securing of capital for investment in future profit growth and the making of stable and sustainable distribution of dividends to shareholders.

The year-end dividend for FY2019.3 is forecasted at 46 yen per share.

Reference:

Contact Information:

ORIX Corporation

Corporate Planning Department

Tel: +81-3-3435-3121

About ORIX:

ORIX Corporation (TSE: 8591; NYSE: IX) is an opportunistic, diversified, innovation-driven global powerhouse with a proven track record of profitability. Established in 1964, ORIX at present operates a diverse portfolio of businesses in the operations, financial services, and investment spaces. ORIX’s highly complementary business activities span industries including: energy, private equity, infrastructure, automotive, ship and aircraft, real estate and retail financial services. ORIX has also spread its business globally by establishing locations in a total of 38 countries and regions across the world. Through its business activities, ORIX has long been committed to corporate citizenship and environmental sustainability. For more details, please visit our website: https://www.orix.co.jp/grp/en/ (As of September 30, 2018)

Caution Concerning Forward Looking Statements:

These documents may contain forward-looking statements about expected future events and financial results that involve risks and uncertainties. Such statements are based on our current expectations and are subject to uncertainties and risks that could cause actual results that differ materially from those described in the forward-looking statements. Factors that could cause such a difference include, but are not limited to, those described under “Risk Factors” in the Company’s annual report on Form 20-F filed with the United States Securities and Exchange Commission and under “(4) Risk Factors” of the “1. Summary of Consolidated Financial Results” of the “Consolidated Financial Results April 1, 2017 – March 31, 2018.”