HAMARU: Brain Test & Training
STUDIO ms32
毎日 脳トレ 1日5分で頭の体操
nullhouse
Math games for kids: Fun facts
Speedymind LLC
Mental arithmetic (Math)
Hiza Games
Math&Logic games for kids
Math Land: Kids Addition Games
Didactoons
Bounce Merge
Geisha Tokyo, Inc.
Think!Think! Games for Kids
Wonderfy Inc.
Multiplication Games For Kids.