August 7, 2018
Progress on Addressing Non-conforming Products at MMC Subsidiaries
Mitsubishi Materials Corporation (“MMC”) sincerely apologizes for the difficulties that we have caused
to all concerned parties, including our customers and shareholders, in connection with Mitsubishi Cable
Industries, Ltd.’s (“MCI”), Mitsubishi Shindoh Co., Ltd.’s (“MSC”), Mitsubishi Aluminum Co., Ltd.’s(“MAC”), Tachibana Metal Mfg Co., Ltd.’s (“TKC”) and Diamet Corporation’s (“DM”) delivery of productsthat deviated from customer or internal specifications (“Non-Conforming Products”) due to misconduct,
including the rewriting of data.
We would like to report today on the safety confirmation status for the relevant companies as follows:

With respect to the delivery of Non-Conforming Products, each of the relevant companies is proceedingwith safety confirmation with the cooperation of their customers. The progress as of August 6, 2018 is asfollows. The figures in parentheses in the tables are the figures as of May 10, 2018.
Safety confirmation has already been completed in approx. 98% of all the customers to which the relevant
companies delivered Non-Conforming Products. In addition, MCI, MSC, MAC, and TKC have completed
the confirmation that there are no safety concerns for major products for their customers and will be excluded
from the disclosure starting with the next disclosure.
The categories, reflecting the status of the relevant companies’ progress in evaluating the safety of affected
products, are as follows:
A. The customer has completed its confirmation that there are no safety concerns.
B. The customer has determined that there are no immediate safety concerns, but is conducting furtherreview.
C. The relevant company (MCI, MSC, MAC, TKC and DM) has communicated to the customers its
opinion that, from a technical perspective, there is a high probability that the affected products canbe assumed to be safe.
D. The relevant company has provided notification that Non-Conforming Products were delivered tothe customer.
1) MCI
Product

NumberA

B

C

Dof
Customers
Seal Product218

213 (201)

5 (17)

0 (0)

0 (0)

MEXCEL53 (3)

2 (2)

0 (0)

0 (0)

2) MSC
ProductNumberA

B

C

DofCustomers
30

Brass-strip and30 (29)

0 (1)

0 (0)

0 (0)

Copper-strip
Products

3) MAC
Number ofProductCustomers

AB

C

D

120
Rolled Products
Extruded
Products

8114

8 (7)

0 (1)

0 (0)

0 (0)

111 (40)

3 (74)

0 (0)

0 (0)

(Note) There are 2 overlapping customers in the number of customers for rolled products andextruded products.
4) TKC
Product
Extruded
Products

Number ofCustomers
339

Ａ

Ｂ

Ｃ

288 (129)

51 (200)Ａ

Ｂ

Ｃ

51 (33)51 (33)

11 (47)Ｄ

0 (10)

0 (0)

5) DM
Product

Number ofCustomers

Sintered
Machinery Parts,

Ｄ
0 (0)

113

etc.
End.
Direct any question to:
Corporate Communications Department, General Affairs Department, Mitsubishi Materials Corporation
TEL : 03-5252-5206
Corporate Administration & Personnel Section, Administration Division, Mitsubishi Cable Industries, Ltd.
TEL : 03-3216-1551
Corporate Administration & Personnel Division, Mitsubishi Shindoh Co., Ltd.
TEL : 03-6629-5850
General Affairs Department, Mitsubishi Aluminum Co., Ltd. (including questions related to TKC)TEL : 03-3769-0111

General Affairs Department, Administration Division, Diamet Corporation
TEL : 025-275-0111