Company Daiko K.K. created these great apps:
HitTunes! - Free Music Player For YouTube, Kaokoro - The Face-Dice Maker, HitBooks - Free eBook Searcher that Covers 153 Countries!, 消費税++, カナカナ!, キョロキョロ, CopyCenter 2, Ages & Birthdays, Ages & Birthdays Pro, All About Today, Photo Widget - Petapeta, Passwordable, and others..
