"Over 100,000 new 3-seat bicycles, designed to carry an adult and two children, have been sold since a ban on their sale was lifted in July of last year, a result one bicycle maker described as "beyond expectations."
Source:Sales of 3-seat bicycles soaring in Japan
Mainichi Japan
August 8, 2010
http://mdn.mainichi.jp/mdnnews/news/20100807p2a00m0na017000c.html