Ethan is now one of only two American kids in his class. The Japanese school year ends in March, the new year begins in April after a two week break. When he goes back in April he'll move up to the Preschool B class, at 4 he moves up to Kindi A, then on to Kindi B.
The 3rd little boy in line is Ethan's best buddy Taketo. He talks about him constantly and every little Japanese boy he sees is "Taketo".