Stock Infomation

As of March 31, 2011

Business Year

The one(1) year period from April 1 of each year to March 31 of the following year

Ordinary General Meeting of Shareholders

June

Record Date

Voting Rights at the Ordinary General Meeting of

Shareholders :	March 31
Year-End Dividends :	March 31
Interim Dividends :	September 30

Transfer Agent

Mitsubishi UFJ Trust and Banking Corporation
1-4-5, Marunouchi, Chiyoda-ku,
Tokyo 100-8212, Japan

Depositary

American Depositary Receipts: The Bank of New York Mellon
101 Barclay Street, New York, NY
10286, U.S.A.
Non-U.S.Callers: +1(201)680-6825
U.S.Callers: 1-888-269-2377(888-BNY-ADRS)
URL:http://www.adrbnymellon.com
Ticker Symbol : KMTUY

One Unit (Tangen) of Shares

100

Total Number of Shares
Issued and Outstanding

968,454,876 Shares (excluding 30,289,184 shares of treasury stock)

Number of Shareholders

219,643

Breakdown of Shareholders

Note:Percentage figures are shown after dropping the last two places of decimals.

Major Shareholders

Name of Shareholders	Number of Shares held (thousand shares)	Equity ratio (%)
Japan Trustee Services Bank, Ltd. (Trust Account)	48,073	4.9
JPMorgan Chase Bank 380055	41,614	4.2
The Master Trust Bank of Japan, Ltd. (Trust Account)	40,978	4.2
Taiyo Life Insurance Company	38,000	3.9
State Street Bank and Trust Company	33,290	3.4
Nippon Life Insurance Company	33,283	3.4
The Bank of New York Mellon as Depositary Bank for Depositary Receipt Holders	21,937	2.2
SSBT OD05 OMNIBUS ACCOUNT – TREATY CLIENTS	19,294	1.9
Sumitomo Mitsui Banking Corporation	17,835	1.8
State Street Bank and Trust Company 505223	17,582	1.8

Notes:
1. Equity ratio is calculated by subtracting treasury stock.
2. Although Komatsu Ltd. holds 30,289 thousand shares of treasury stock, it is excluded from the major shareholders list above.