When Yoko's grandparents send her a beautful antique doll all the way from Japan, Yoko the cat couldn't be happier. She places Miki on a windowsill and brings her candy every day. On Girls' Festival Day, Yoko wants to show Miki to her class and tell them all about the Japanese holiday. In her Big No voice Mama says, "We don't trouble trouble or trouble will trouble us." But Yoko is so excited about Girls' Day that she can't resist taking Miki to school....

Yoko loves kindergarten, but she doesn't want her mother to leave--until her new friend helps her realize that "mothers always come back."

When Yoko brings sushi to school for lunch, her classmates make fun of what she eats--until one of them tries it for himself.

A little mouse named Spinka creates mischief that twin kittens Kit and Kaboodle are blamed for by their parents.

The students in Mrs. Jenkins' class explore the careers they'd like to have when they grow up, including Yoko who wants to be a Japanese teacher.

Despite the doubts of some classmates and her native-born Japanese mother's inability to read English, Yoko finds the key to reading and catches up with the other students in putting new leaves on the classroom's book tree.

Kindergartner Yoko not only learns to write her letters and numbers in English, she shows her teacher and fellow students how to write their names using Japanese calligraphy.