As you are asking about the contact detail of Mizuho Corporate Bank which is at Milan please look at below side you will get all information

Address

6th Floor, Largo Augusto 7, 20122 Milan, Republic of Italy
Tel. 39-02-778-0001
Open Monday – Friday

Activities
Deposit-taking
Lending
Remittance, forward exchange contracts
Guarantees, etc.

Mizuho Corporate Bank, Ltd or MHCB, was the corporate and investment banking subsidiary of Mizuho Financial Group, the second-biggest Japanese financial services conglomerate, prior to the reintegration of investment banking services under the Mizuho Bank name in July 2013

First of all go to the official website of Mizuho Corporate Bank which look like below given image


On this page you will get an option Branches which is on the right hand side please you are requested to click on that and you will be directed to a new page which look like below given image

On this page you will get an option of List of Branches in Japan please click on it and you will be directed to a new page which looks like below given image



on this page you will have to enter all the detail information and click on search option you will get all detail information about branches of Mizuho Corporate Bank

Contact Detail
Mizuho Bank
Japan,
〒100-0004 Tōkyō-to,
Chiyoda-ku, Ōtemachi, 1
Chome−5,

Map