[Translation]
June 12, 2021
To whom it may concern:
Company Name:
Name of Representative:

Contact:

Phone:

Company Name:
Name of Representative:

Contact:

Phone:

Mitsui Chemicals, Inc.
Osamu Hashimoto
President & CEO(Securities code: 4183)
Junichi Inoue
General Manager of Corporate
Communications Division+81-3-6253-2100

Mitsui & Co., Ltd.
Kenichi Hori
President and Chief Executive Officer(Securities code: 8031)
Masaya Inamuro
General Manager of Investor Relations
Division+81-3-3285-7657

Notice Regarding Results of Tender Offer for Shares ofHonshu Chemical Industry Co., Ltd. (Securities Code: 4115)
Mitsui Chemicals, Inc. ("Mitsui Chemicals") and Mitsui & Co., Ltd. ("Mitsui & Co." and together with
Mitsui Chemicals, the "Offerors") commenced a tender offer (the “Tender Offer”) for the common stock(the "Target's Shares") of Honshu Chemical Industry Co., Ltd. (the "Target") from May 17, 2021. The
Tender Offer was completed on June 11, 2021 and the Offerors hereby report on the results as follows.

1. Summary of tender offer(1) Name and location of the Offerors
Name:

Mitsui Chemicals, Inc.

Location:

5-2, Higashi-Shimbashi 1-Chome, Minato-ku, Tokyo

Name:

Mitsui & Co., Ltd.

Location:

2-1, Otemachi 1-Chome, Chiyoda-ku, Tokyo1(2) Name of the Target
Honshu Chemical Industry Co., Ltd.

(3) Type of shares to be purchased
Common stock(4) Number of shares to be purchased

Type of shares

Number of tenderedshares to be purchased

Minimum number ofMaximum number oftendered shares to betendered shares to bepurchased

purchased

Common stock

5,280,788 shares

1,455,200 shares-Total5,280,788 shares

1,455,200 shares-(Note 1)

If the total number of shares, etc. tendered in the Tender Offer (the "Tendered Shares") isless than the minimum number of tendered shares to be purchased in the Tender Offer(1,455,200 shares), the Offerors will purchase none of the Tendered Shares. If the total
number of the Tendered Shares is no less than the minimum number of tendered shares tobe purchased in the Tender Offer, the Offerors will purchase all of the Tendered Shares.

(Note 2)The number of tendered shares to be purchased is the maximum number of the Target'sShares (5,280,788 shares) that the Offerors will acquire by the Tender Offer. This maximum
number is obtained by deducting the number of treasury shares owned by the Target as ofMarch 31, 2021 (23,212 shares), the number of shares owned by Mitsui Chemicals on thesame date (3,098,000 shares), and the number of shares owned by Mitsui & Co. as of thesame date (3,098,000 shares) from the total number of issued shares of the Target as of thesame date (11,500,000 shares) as stated in the "Consolidated Financial Results for the Fiscal
Year Ended March 31, 2021 (Japanese GAAP)" published by the Target on May 14, 2021(the "Target's Annual Earnings Briefing").

(Note 3)

Shares less than one unit are also subject to the Tender Offer. If a shareholder exercises theright to claim for purchase of shares less than one unit pursuant to the Companies Act (ActNo. 86 of 2005, as amended), the Target may purchase its shares during the purchase periodfor the Tender Offer (the “Tender Offer Period”) in accordance with the statutory
procedures.

(Note 4) The treasury shares owned by the Target are not scheduled to be acquired through theTender Offer.
(Note 5)

With respect to Mitsui Chemicals and Mitsui & Co.’s method to purchase the Tendered2Shares, (a) if the total number of the Tendered Shares is 2,487,859 or more, Mitsui
Chemicals will purchase the Tendered Shares up to 2,640,394 shares and Mitsui & Co. willpurchase the remainder of the Tendered Shares up to the total number of the Tendered
Shares; and (b) if the total number of the Tendered Shares is less than 2,487,859, each of
the Offerors will purchase one half of the total number of the Tendered Shares (fractionalnumbers, if any, shall be rounded up with respect to the shares to be purchased by Mitsui
Chemicals, and shall be rounded down with respect to the shares to be purchased by Mitsui& Co.).

(5) Tender Offer Period(I)

Tender offer period as of the submission date of the tender offer registration statement
From May 17, 2021 (Monday) through June 11, 2021 (Friday) (20 business days)(II) Possibility of extending the above period upon request from the Target
If the Target had submitted a statement of opinion requesting an extension of the Tender
Offer Period pursuant to Article 27-10, Paragraph 3 of the Financial Instruments andExchange Act (Act No. 25 of 1948, as amended; the “Act”), the Tender Offer Period would
have been extended to June 25, 2021 (Friday) (30 business days). However, that did not
happen.

(6) Price of tender offer
1,830 yen per share of the common stock2.

Results of tender offer(1)

Whether the Tender Offer has been successful

In the Tender Offer, a condition was set that if the total number of the Tendered Shares is less thanthe minimum number of tendered shares to be purchased in the Tender Offer (1,455,200 shares),the Offerors will purchase none of the Tendered Shares. However, because the total number of theTendered Shares (3,519,137 shares) resulted in no less than the minimum number of tenderedshares to be purchased in the Tender Offer (1,455,200 shares), the Offerors will therefore purchaseall of the Tendered Shares as stated in the public notice on the commencement of the tender offer
and the tender offer registration statement.

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(2)

Date of public notice concerning results of the Tender Offer, and name of daily newspaper onwhich the public notice is posted

Pursuant to Article 27-13, Paragraph 1 of the Act, on June 12, 2021, the Offerors announced tothe press the results of the Tender Offer at Tokyo Stock Exchange, Inc., by the method prescribedin Article 9-4 of the Order for Enforcement of the Financial Instruments and Exchange Act(Cabinet Order No. 321 of 1965, as amended) and Article 30-2 of the Cabinet Office Ordinanceon Disclosure Required for Tender Offer for Share Certificates, etc. by Persons Other Than Issuers(Ordinance of the Ministry of Finance No. 38 of 1990, as amended; the "Cabinet Office
Ordinance").

(3)

Number of purchased shares

Type of shares
Sharesa. Number of tendered sharesb. Number of purchased shares

after conversion

after conversion

3,519,137 shares

3,519,137 shares--------

3,519,137 shares

3,519,137 shares

(-)

(-)

Share options certificates
Corporate

bondcertificateswith share options
Beneficiary

certificatesofshares in trust()

Depository receipts for shares()
Total(Total

numberofshares

diluted)(Note) With respect to the method to purchase the Tendered Shares by Mitsui Chemicals and Mitsui& Co., (a) if the total number of the Tendered Shares is 2,487,859 or more, Mitsui Chemicals
will purchase the Tendered Shares up to 2,640,394 shares and Mitsui & Co. will purchase theremainder of the Tendered Shares up to the total number of the Tendered Shares; and (b) if thetotal number of the Tendered Shares is less than 2,487,859, each of the Offerors will purchase
one half of the total number of the Tendered Shares (fractional numbers, if any, shall be
rounded up with respect to the shares to be purchased by Mitsui Chemicals, and shall be
rounded down with respect to the shares to be purchased by Mitsui & Co.). The breakdown ofthe "Number of purchased shares after conversion" respectively by Mitsui Chemicals and4

Mitsui & Co. is as follows.

(4)

Name of the Offerors

Number of purchased shares after conversion

Mitsui Chemicals

2,640,394shares

Mitsui & Co.

878,743shares

Shareholding ratio after the Tender Offer

Numberof

votingrightspertaining to the shares held by

61,960the Offerors before the Tender(Shareholding Ratio before the Tender Offer
53.99%)

Offer
Numberofvotingrights

pertaining to the shares held by118special related parties before(Shareholding Ratio before the Tender Offer0.10%)

the Tender Offer
Numberofvotingrights

pertaining to the shares held by

97,150the Offerors after the Tender(Shareholding Ratio after the Tender Offer
84.65%)

Offer
Numberof

votingrights

pertaining to the shares held by

0special related parties after the(Shareholding Ratio after the Tender Offer-%)

Tender Offer
Total number of voting rights
of all shareholders of the114,671

Target(Note 1) "Number of voting rights pertaining to the shares held by special related parties before theTender Offer" and "Number of voting rights pertaining to the shares held by special relatedparties after the Tender Offer" are the total number of voting rights pertaining to shares heldby each special related party (excluding the parties that shall be excluded from special
related parties pursuant to Article 3, Paragraph 2, Item (ⅰ) of the Cabinet Office Ordinancefor the purpose of calculating the shareholding ratio, etc. set out in each item under Article
27-2, Paragraph 1 of the Act, and the Offerors which mutually constitute a special relatedparty of the other).
(Note 2) "Total number of voting rights of all shareholders of the Target" is the number of the voting
rights of all shareholders as of September 30, 2020 as stated in the Target’s Quarterly
5Securities Report for the Third Quarter of the 92nd Fiscal Year filed on February 10, 2021.
However, because shares less than one unit were also subject to purchase in the Tender
Offer, "Shareholding Ratio before the Tender Offer" and "Shareholding Ratio after theTender Offer" are calculated based on the denominator of voting rights (114,767) pertainingto the number of shares (11,476,788 shares) obtained by deducting the treasury shares(23,212 shares) held by the Target as of March 31, 2021 from the total number of issued
shares (11,500,000 shares) as of the same day as stated in the Target’s Annual Earnings
Briefing.
(Note 3)

"Shareholding Ratio before the Tender Offer" and "Shareholding Ratio after the Tender
Offer" are indicated by rounding to the second decimal place.

(5)

Calculation in the case where purchase, etc. is conducted on a pro rata basis
There are no applicable matters.

(6)

Method of settlement(I)

Name and location of head office of the financial instruments business operator or bank, etc.
in charge of settlement of the tender offer(Tender offer agent)
SMBC Nikko Securities Inc.

(II)

3-1, Marunouchi 3-Chome, Chiyoda-ku, Tokyo

Commencement date of settlement
June 18, 2021 (Friday)(III)

Method of settlement

A written notice concerning purchase, etc. through the Tender Offer shall be sent by post to
the address or location of each of the persons who tendered their shares in response to theoffer to purchase the shares pertaining to the Tender Offer (the "Tendering Shareholders") (orthe standing proxy in the case of non-resident shareholders) without delay after completionof the Tender Offer Period. The notice shall be given electronically for tenders made through
Nikko Easy Trade.

The purchase shall be made in cash. The sales proceeds for the purchased shares, etc. shallbe remitted from the tender offer agent to the location designated by the Tendering
Shareholders (or the standing proxy in the case of non-resident shareholders) without delay

6

after the commencement date of the settlement as instructed by the Tendering Shareholders(or the standing proxy in the case of non-resident shareholders).

3.

Policies after the Tender Offer and perspectives

For our policies after the Tender Offer, there is no change from those stated in “Notice Regarding
Commencement of Tender Offer for Shares of Honshu Chemical Industry Co., Ltd. (Securities Code:4115)” published by the Offerors on May 14, 2021.

4.

Location at which copy of the Tender Offer Report is available to the public

Mitsui Chemicals, Inc.:

5-2, Higashi-Shimbashi 1-Chome, Minato-ku, Tokyo

Mitsui & Co., Ltd.:

2-1, Otemachi 1-Chome, Chiyoda-ku, Tokyo

Tokyo Stock Exchange, Inc.: 2-1, Nihombashi Kabuto-cho, Chuo-ku, TokyoEnd7