About SushiLock
This application can lock the screen by sequentially specifying your favorite sushi topping.
Because it can reflect your preference, the possibility of forgetting the password is low. Therefore, it is not easily guessed by another person.
Even if you forget the turn of the lock, it is safe. because the "Sushi Lock" can set PIN cord with four-digit number.
The display of the sushi topping can choose fixation or shuffle which changes and displays a position at random.
※EULA
http://fudemame.net/products/app/android/license_2013/lic_2013_sushi.pdf