ASAHI KASEI CORPORATION

Exhibit (d)(4)

ASAHI KASEI CORPORATION

1-105 Xxxxx Xxxxxxxx, Xxxxxxx-xx,

Xxxxx 000-0000, Xxxxx

Phone: x00-(0)0-0000-0000

Fax: x00-(0)0-0000-0000

URL: xxx.xxxxx-xxxxx.xx.xx

March 29, 2012

Xx. Xxxxxxx X. Xxxxxx

0 Xxxxxxx Xxxxx

Xxxxxxxxxxx, XX 00000

Dear Xx. Xxxxxx:

You have requested a waiver from the Tender and Voting Agreement dated as of March 12, 2012 between the undersigned and you (the “Tender Agreement”) to permit you to donate to a directed charitable gift fund account at Fidelity Charitable Gift Fund (the “Charitable Fund”) up to 50,000 shares of the Common Stock of ZOLL Medical Corporation owned by you (the “Shares”). This waiver will render the terms of the Tender Agreement inapplicable with respect to the Shares. The undersigned is in receipt of a letter dated March 29, 2012 from the Charitable Fund to Asahi Kasei Corporation informing it that the Charitable Fund will promptly tender in the Offer (as defined in the Tender Agreement) all Shares donated by you.

The undersigned hereby grant a waiver from the terms of the Tender Agreement to permit you to donate such Shares to the Charitable Fund as described above.

				Asahi Kasei Corporation
				By:		/s/ Taketsugu Fujiwara
						Name: Xx. Xxxxxxxxx Xxxxxxxx
						Title: President and Representative Director

				Asahi Kasei Holdings US, Inc.
				By:		/s/ Hideo Hikami
						Name: Mr. Hideo Hikami
						Title: President

				Asclepius Subsidiary Corporation
				By:		/s/ Hideo Hikami
						Name: Mr. Hideo Hikami
						Title: President