Talk:Japan/@comment-26181719-20150313090859

http://www.yodobashi.com/ec/category/index.html?cate=&word=ワイヤレスゲート+SIM&ginput=

That will take you to the Yodobashi Camera site and show you SIM cards with monthly plans. Open it in Chrome and it can be translated into English. Navigated through nine pages and couldn't find the pre-paid without a plan sim. :-(