In fact, if you hold a re-entry permit, or are a citizen, it might actually turn out quicker to get through with the new system (and make your 5 minute dash something that isnt pure fiction!). Why? Becuase if you fill out the correct form beforehand (one off requirement) you can go through an automated gate. Which in the long run could well turn out far quicker, if there is a lot of them... see here: http://www.moj.go.jp/NYUKAN/nyukan63-3.pdf