Sumitomo Chemical Announces Revisions to its Consolidated Full-Year Financial Forecast for Year Ending March 31, 2010

For Immediate Release April 26, 2010

Sumitomo Chemical Announces Revisions to its Consolidated
Full-Year Financial Forecast for Year Ending March 31, 2010

Based on recent performance trends, Sumitomo Chemical Co., Ltd. (“the Company”) has revised its
consolidated financial forecast announced on October 30, 2009.

Revision to Consolidated Financial Forecast

(1) Revised Consolidated Financial Forecast for the Full-Year Ending March 31, 2010
（
Millions of yen）

Sales
Operating
Income
Ordinary
Income
Net Income
Earnings Per
Share
Previous Forecast (A)
1,620,000 35,000 20,000 10,000
6.06
Revised Forecast (B)
1,620,000 50,000 35,000 15,000
9.09
Variance in Amount (B-A) 0
15,000
15,000
5,000

Variance in Percentage (%) 0.0
42.9 75.0 50.0

Results for Full-Year Ended
March 31, 2009
1,788,223 2,114
△
32,624
△
59,164
△
35.84

(2) Reasons for the Revision
In addition to better than expected market prices for products in the Company’s Basic Chemicals
and Petrochemicals & Plastics segments, decreased expenses in the Pharmaceuticals and other
segments are expected to result in a 42.9% increase in operating income, a 75.0% increase in
ordinary income, and a 50.0% increase in net income compared to previous forecasts.
Cautionary Statement
Statements made in this document with respect to Sumitomo Chemical’s current plans, estimates,
strategies and beliefs that are not historical facts are forward-looking statements about the future
performance of Sumitomo Chemical. These statements are based on management’s assumptions
and beliefs in light of the information currently available to it, and involve risks and uncertainties.
The important factors that could cause actual results to differ materially from those discussed in
the forward-looking statements include, but are not limited to, general economic conditions in
Sumitomo Chemical’s markets; demand for, and competitive pricing pressure on, Sumitomo
Chemical’s products in the marketplace; Sumitomo Chemical’s ability to continue to win
acceptance for its products in these highly competitive markets; and movements of currency
exchange rates.