Charging iPhone battery

Hi, does anyone know of any places where you can use power outlets to charge your phone in Tokyo?

I'm currently in Japan and will be for the next two weeks. I've been here for two days already and I run into the trouble of my battery dying too soon. I know that Starbucks and McDonald's has it but each time that I go it's always busy or there's no power outlets in sight.

If anyone can get to me about this thank you!

I've never used one, but possibly you could find one of those energy packs that you charge at home (or at the hotel in this case) and then bring with you to charge your phone on the go? I'd imagine larger electronics stores like yodobashi camera or bic would carry them.

I'd also recommend getting a portable battery pack for your trip. They're sold at any electronics store or most convenience stores in Japan.

I think that helps this page is of you.

https://translate.google.co.jp/translate?sl=ja&tl=en&js=y&prev=_t&hl=j...