Ritsuko Kawai

• Hamtaro
• Do the Ham-Ham Dance
• Hamtaro Board Game Book
• A Home for Hamtaro and Other Stories (The Adventures of Hamtaro, Vol. 1)
• Hamtaro 8x8 #4 (Hamtaro)
• Hamtaro Abc Book
• Hamtaro Gets Lost and Other Stories (The Adventures of Hamtaro, Vol. 2)
• Hamtaro Hamster Care Guide
• Hamtaro Much Ado About School
• Hamtaro Origami
• Hamtaro Pop-Up Playset (Hamtaro)
• Hamtaro Punch-Out Activity Book (Hamtaro)