As the fourth sign of the zodiac, Cancer represents the fourth stage in the evolution of man and his place in the universe. In Cancer the need is not one of individual survival as it was in the first three signs. Here, it is eternal survival through perpetuation of the species. It is the sign of fertility and nurture, and Cancerians have strong identification with these matters in one form or another. It doesn't mean all of them are good cooks or efficient housekeepers, but they all want to feel part of a family. They enjoy feeding others as much as they enjoy feeding themselves. They are also ready to supply emotional nurturing by "mothering" everyone who appears to be in need. When upset, they tend to use food as consolation, which in turn, results in problems with excess weight. As an offshoot of their sense of familial relationships, they often develop an interest in genealogy and history in general.

Cancer will find their greatest security within the structure of a family setting due to the maternal side and the need to protect those in his or her charge. There is a homey feel about Cancer that draws the other signs; You have the ability to attune to the moods of others quickly or to change their moods to suit yours; you should not underestimate your effect on people and you should learn to use this ability wisely and not just for personal gain.

Cancerians react emotionally to everything they experience in life. That is, before they take physical action, before they sort out the practicality of what they are doing, and before they reason things out intellectually, they must express their feelings. They wear their hearts on their sleeves. Many Cancerians succeed in life because their genuine concern for the welfare of others inspires loyalty as well as cooperation.

The biggest struggle for Cancerians is to avoid becoming prisoners of their own emotions. Though they can be outwardly gregarious, they are shy and secretive about their personal matters. However, once they feel comfortable in a situation or relationship, they relax and completely open up even to the point of dominating the situation. Not usually ones to suffer in silence, they have to make an effort not to inflict their moods and endless recitations of their feelings or emotional troubles on others. Once they learn to keep excess emotions in control, their intuition can be remarkably accurate. Their emotional insecurity makes them want to hang on to things. They hate to throw anything away, and many end up avid collectors, conservators, and savers of string. It is equally difficult for them to give up on failed relationships, and still harder for them to learn the difference between caring and possessiveness. When they receive criticism, even constructive criticism, they tend to take it as a personal indictment instead of using it to attain personal growth and maturity.

Type O

People with blood type O people are outgoing, energetic and social. They are the most flexible of the blood types. They easily start up projects but often have trouble following through because they give up easily. They are flighty and not too dependable. O types always say what's on their mind. They value the opinion of others and like to be the center of attention. Also, people with O blood are extremely self-confident.

Type O, the most "average" blood type, is considered the best type in Japan.