Check the Sofmap shop in the Yokohama Vivre Fashion Building shopping center, which is a short walk from the Yokohama Station West Exit. The Sofmap shop is on the 7th floor near the BIC Camera Outlet.

Sofmap is part of the BIC Camera Group and carries new and used computers, parts, and other electronics. Sofmap shops are sometimes located inside of BIC Camera stores, but in Yokohama it is separate from the regular BIC Camera store, which is one block over from Vivre.

Here's a link to the Sofmap store information through Google Translate. Perhaps the hotel concierge can call the shop to see if they have what you need.

https://translate.google.com/transla...ama&edit-text=

Interesting that gnaget had an iGo Juice adapter that failed. I had an iGo Juice a few years ago, and only had problems with it in Japan. It would work for a while, then shut itself off for several hours, then work again for a while. It seemed like it might be some kind of thermal protection that was causing it to shut itself off.