Osu, Looks like someone has been reading his International Karate Organization Kyokushin Students Hand Book. I have heard many people speak of the spirit of osu and its meaning, and with as many different understandings. To date, although exposed to some of Kyokushin's best and brightest, I cannot say that I have mastered the ability to, in a scholarly manner, provide one simple definition to this concept. This is because the spirit of osu encompasses a multi-dimensional definition.It allows for each one of us to apply all or some of its philosophies within our lives. Confucius wrote that "sincerity is the end and the beginning of all things." He goes on to say that "perceiving what is right, and what is not, argues lack of courage." This is so true of what Osu and Kyuokushinkai is. There is a saying in Japan, Ishi no ue ni san nen, Translated, it means "three years on a rock." This saying symbolizes the need to perservere at all times and it is one of the most important philosophies in Kyokushinkai Karate. A Budo-ka is not easily shaken by the blows of adversity, realizing that for a person to draw near to their true pontential, a never-say-die spirit of perserverance is required. This strength of character develops in hard training and is known as osu no seishin. The word osu comes from oshi shinobu, which means "to persevere whilst being pushed". It implies a willingness to push oneself to the limits of endurance, to persevere under any kind of pressure. The single word osu captures most accurately the ultimate in what the art of karate, particularly Kyokushin has to offer. Osu. Paul Paterson.