ERATO Minato Project, Japan Science and Technology Agency, Sapporo 060-0814, Japan.|ERATO Minato Project, Japan Science and Technology Agency, Sapporo 060-0814, Japan.|ERATO Minato Project, Japan Science and Technology Agency, Sapporo 060-0814, Japan.|ERATO Minato Project, Japan Science and Technology Agency, Sapporo 060-0814, Japan.|ERATO Minato Project, Japan Science and Technology Agency, Sapporo 060-0814, Japan.