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English version is here / 日本語版はこちら It is not only the "motion" of the swing path that determines shot accuracy. It is the toughness of the Swing Architecture (posture) that supports it. Posture refers to Optimizing the ...

English version is here / 日本語版はこちら In the world of junior tennis, a large takeback is a common sight. While it may appear dynamic and powerful, from the perspective of an Architect (Designer), it is often recognized as a bug that...

English version is here / 日本語版はこちら A bad workman always blames his tools—. In the world of tennis, where the retribution of physical output governs all, this proverb harbors a logical bug that inhibits the growth of junior player...

English version is here / 日本語版はこちら In tennis, the starting point of every rally is the Ready Position. However, many players misidentify this as a passive static state—waiting because the opponent is about to hit. In the Architec...

English version is here /日本語版はこちら Do not just learn How to hold a racket, but synchronize your Internal OS with the device. The cause of power loss in many juniors is the Noise (Gaps) hidden in the palm. This document discloses t...