The general purpose of this research was to study the signification of the shout on Kendo. The focus of this study was to explore a historical formative stage and philological formative process of the shout. This investigation was carried on a condition that the shout is not essential according to The Conception of Kendo and the teaching which the shout should be voiceless in the extremity.<br>The shout of the age at civil wars was one of the weapons. In the Edo period the existence of the shout was decided by the dogma of each Kenjutsuryuha (Kendo school). In the Meiji period the shout became to admit as one of the practice methods assuming the unconscious KAKEGOE, and in this time both modern style and understanding of KAKEGOE were formatted. To get a lot of effects on voiceless condition more than on shout, modern Kendo has a recognition about the KAKEGOE that the more skill player, the more little shout after going through an unconscious and natural shout.<br>In the practice and the match handling a BOKUTO, the spot of the boby for DATOTSU (strike) might be named (KOSYO) before striking. In and after the 1750's, according to use SHINAI and BOGU (a protector), the original form of DATOTSUBUIKOSYO occurred. Modern style of DATOTSUBUIKOSYO can be confirmed by a bibliography of the early Meiji period. In the later Meiji Period DATOTSUBUIKOSYO was located as a necessary shout at the minimum. It is indicated by the existence of DATOTSUBUIKOSYO that Kendo is on longer a tool of an actual warfare but a movement culture.<br>KAKEGOE and DATOTSUBUIKOSYO are coming to this day with advancing in their philological functions both phylogenetically and ontogenetically. The shout which is related to high spirits is closely connected with YUKO (valid) DATOTSU (a point). KAKEGOE may include a function that a player demonstrates one's high spirits to a third person by it. DATOTSUBUIKOSYO may also involve the possibility that it contains a potentiality of a lie. These functions of the shouts are contrary to The Conception of Kendo.<br>Both DATOTSUBUIKOSYO by a player and YUKODATOTSU Announcement by the Chief Referee at YUKODATOTSU are the highest language level. The correspondence with a mind of player seems to DATOTSUBUIKOSYO back and forth. It may be possible for the excellent player to format DATOTSUBUIKOSYO in the speech area neverthless he or she does not shout (DATOTSUBUIKOSYO).<br>A study on the level of a detachment may be a next theme.