This study was designed to develop a device （DSH） to measure the maximum spike height （Hs-max） in volleyball and examine its measurement methods. DSH measures the height of a ball， which is suspended and can be moved between 200 and 380 cm from the ground，when it is hit by a player. We selected thirty male university volleyball spikers， and measured the height of the tip of the middle finger with their arm stretched overhead（ Hf） and the maximum vertical jump height（ Hmax）. Then， we asked them to spike a tossed ball， and measured the height（ Hs） and speed of the ball when it was hit， using the 3D direct liner transformation（ DLT） method. After having spiked a ball at many different levels， players evaluated the height（ SAh） and speed（ SAv） of the ball in each spike on a ten-score scale. We defined the height of the ball when [SAh + SAv] is maximum as “Hs-max” There were correlations between the ball height and SAh， and the ball speed measured by DSH and SAv. Since there was also a correlation between [SAh + SAv] and SAh or SAv， Hs-max proved to be valid. 　We selected twenty female university students， and measured Hs-max twice in two days using DSH. The reliability coefficient for the measurements was as high as 0.913. We divided the players into two groups: Group HS （n=15）， players who spiked the ball at a height of 285.5 cm or more; and Group LS（ n=15）， players who spiked at 285 cm or less. Hs-max was significantly larger（ p＜0.05） and “Hs-max - Hs” was significantly smaller（ p＜0.01） in Group HS， compared to Group LS. The players in Group HS not only spiked the ball at higher points，but they were also good at controlling the timing of jump in order to spike at their maximum jump than those in Group LS. We concluded that the newly developed device， DSH， can measure the Hs-max values with excellent reliability and that the the Hs-max would provide valuable information for both players and coaches.

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The study shows how the Break affects on the victory of the volleyball game for the second national league (V-Challenge League) in Japan. The purpose of this study is to get index that how the serve affects on the each rate of the 3 break point which includes Serve, Block, Transition Attack and Opponent Miss. As a result, it’s summarized as follows. 1) The 3 break point affects on the victory of game greatly. 2) The increase of the points by Jumped serve affects on the victory of game. 3) The increase of the points by block affects on the win of game in the situation of starting with the Float serve. 4) The increase of the points by transition attack with the effective Float serve affects on the victory of game. 5) Regardless of the various kind of serve, the error after the perfect reception affects on the loss of the game for the reception team. And the reception which goes over the net affects on the game.

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　The purpose of this study is to get the management suggestions on the V-Challenge League home game enterprise by focusing on the business structure on “Tsukuba United” home game executive. It is studied on three analysis angles, organization , profit enterprise and marketing. The conclusion is follow. (1) The accomplishments on the conduct of home game on “Tsukuba United” . ① Trying to create the new customers by new style casting ,which is organized by various citizen’s active groups. ② The original business structure , that is composed by three factors of good game , volunteers with special skill and organizer , is beginning to be built. ③ It is the conduct of the home game enterprise being based on V-League home game keystones accurately. (2) The issues on the conduct of home game on “Tsukuba United” . Productivity is still developing and it is necessary to project more tactical business plan. (3) The suggestion to V-Challenge League home game enterprise. It is necessary to practice the marketing for popularization of volleyball , and for this , it is required to practice the strategic human resource management to local communities.

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　This study was to clarify investigated attempting to show clearly the component elements for the accomplishment process of blocking action in volleyball, and with focus on serve phase, rally phase and attack tempos. 　Blocking is supposed to be a difficult skill. And the study of evaluating its effects has already been advanced, and we would like to present the component elements of assessment of blocking action under the situation itself today. The subjects of this study were 2007/8 Japanese men’s top league club in V Premier League. The number of the sample was 4 matches, 14 sets and 606 plays. The data were processed using statistic methods such as t-test. The results were summarized as followings: 1. Serve phase (1)1st tempo attacking…“Anticipating for setting in attacking area” and “Height of blocking”. (2)2nd tempo attacking…“Ready Posture”, “Anticipating for setting in attacking area” and “Height of blocking”. (3)3rd tempo attacking…“Ready Posture” and “Height of blocking”. 2. Rally phase (4)1st tempo attacking…“Anticipating for setting in attacking area” and “Height of blocking”. (5) 2nd tempo attacking…“The number of blockers” and “Height of blocking”. (6) 3rd tempo attacking…None.

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