Infants and small children can ride in a pram or stroller. Public transportation options are available nearby. Specialized infant seats are available. Not recommended for travelers with spinal injuries. Not recommended for pregnant travelers. Not recommended for travelers with poor cardiovascular health. Suitable for all physical fitness levels. Depending on the ski resort, Infants below 4 years old may not participate the lesson.. Infant under 6 years old are required to sit on infant seat according to the Japanese law.