Electric bicycles are pretty big in Japan - a lot of mothers and housewives use them to get around all the time as they don't tire you as much as normal bikes.
Also, there's a few bicycles these days with two childseats, so that's a lot of weight to cart around.
Also, there's a few bicycles these days with two childseats, so that's a lot of weight to cart around.
A bit of info here: http://www.japantimes.co.jp/life/2008/08/17/travel/electric-...