Shinzou is Kanzou's younger brother. He uses weapons made from wood. He is a ninja-in-training who learns to be a good ninja, like Kanzou. He wears red colored ninja robes. Shinzou seems to have a good heart and sticks to being loyal to his brother and sometimes gets excited when others are excited. Some of the times, Shinzou tricks Hattori to giving him things. He is also known to cry very loudly, disturbing people and even fainting them. He is also very powerful for his age, at 7 years old. He helps Kanzou fight Kemumaki, with his real weapons and control his loud crying (which immobilizes opponents from attacking) and bites the head of the opponents.

(Source: Wikipedia)