UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM CB

TENDER OFFER/RIGHTS OFFERING NOTIFICATION FORM

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to file this Form:

Securities Act Rule 801 (Rights Offering)	☐
Securities Act Rule 802 (Exchange Offer)	☒
Exchange Act Rule 13e-4(h)(8) (Issuer Tender Offer)	☐
Exchange Act Rule 14d-1(c) (Third Party Tender Offer)	☐
Exchange Act Rule 14e-2(d) (Subject Company Response)	☐
Filed or submitted in paper if permitted by Regulation S-T Rule 101(b)(8)	☐

Showa Shell Sekiyu Kabushiki Kaisha

(Name of Subject Company)

Showa Shell Sekiyu K.K.

(Translation of Subject Company’s Name into English (if applicable))

Japan

(Jurisdiction of Subject Company’s Incorporation or Organization)

Idemitsu Kosan Co., Ltd.

(Name of Person(s) Furnishing Form)

Common Stock

(Title of Class of Subject Securities)

N/A

(CUSIP Number of Class of Securities (if applicable))

Idemitsu Kosan Co., Ltd.

Attn: Koji Tokumitsu

1-1 Marunouchi 3-chome

Chiyoda-ku, Tokyo 100-8321

Japan

+81-3-3213-9307

(Name, Address (including zip code) and Telephone Number (including area code)

of Person(s) Authorized to Receive Notices and Communications on Behalf of Subject Company)

N/A

(Date Tender Offer/Rights Offering Commenced)

PART I – INFORMATION SENT TO SECURITY HOLDERS

Item 1.  Home Jurisdiction Documents

Exhibit Number
99.1	Announcement Regarding Execution of Business Integration Agreement
99.2	Announcement Regarding Execution of Agreement with Our Major Shareholders
99.3	Announcement Regarding Acquisition of Treasury Shares

Item 2.  Informational Legends

The required legend is prominently included in the document(s) referred to in Item 1.

PART II – INFORMATION NOT REQUIRED TO BE SENT TO SECURITY HOLDERS

N/A

PART III – CONSENT TO SERVICE OF PROCESS

Idemitsu Kosan Co., Ltd. submitted to the Securities and Exchange Commission written irrevocable consent and power of attorney on Form F-X dated June 17, 2016.

SIGNATURES

After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Idemitsu Kosan Co., Ltd.

/s/ Toyotaka Kai                                

Name: Toyotaka Kai

Title: Manager, Consolidated Accounting Section

Date: July 10, 2018