Luggage storage place near Yokohama?

Does anyone know where there is a luggage storage place near Yokohama? Looking to leave some luggage for 4 days when we travel to West Japan. Maybe Train station?

Thanks for you time

It seems to me custody at 720 yen per day in the second lobby of YCAT.
http://www.ycat.co.jp/service.html
http://www.ycat.co.jp/en/accessmap.html
Seems could cloak services to tourist office of CIAL of Sakuragi-cho Station, but I do not know the price.
Seems can also dispatch procedure of international courier.
http://www.cial.co.jp/sakuragicho/floorguide/

You can also use delivery service.

http://www.japan-guide.com/e/e2278.html

You can specify the date of delivery up to 7 days after parcels have been entrusted.

http://www.kuronekoyamato.co.jp/en/contact/faq/02/

see A2.

You can receive your luggage in your accommodation or at the airport.