Ninja hand signs consist of the 12 creatures of the Chinese zodiac, such as the rat and the ox. These signs also all have an association with the months of the year and the cardinal directions such as north, south, east and west.
The tiger hand sign consists of putting the two hands together with the index and middle finger in a position against each other in an upward position. It has an association with the north and northeast and represents the month of January. The snake hand sign requires putting both hands together and intertwining the fingers, with the palms pushing against each other. It represents the month of April and has an association with south and southeast.
The ninja hand signs derive from Hindu and Buddhist iconography and are known as "Mudra," meaning sign or seal in Sanskrit. The sign horse is the seventh sign in the Chinese zodiac and has an association with south and the month of May. Every sign has a different word than its partner Chinese zodiac animal, as well. The sign boar which is the twelfth sign of the Chinese zodiac consists of the hands being put into a fist position and held upside down together. It is also known as "I."