The purpose of this study is to look at the decisions on yuko-datotsu being made through the system of "Claim for Judgment Using VTR" that the Korea Business Kumdo Federation (KBKF) has introduced. This thesis is organized as follows:
·Details leading up to the introduction of "Claim for Judgment Using VTR".
·Clarification of its regulations and subsidiary.
·Analysis of the assessment of decisions made using a video tape recorder (VTR).
·The relation between decisions made using the VTR and the requirements of yuko-datotsu.
The results obtained were as follow:
1.Before the introduction of the "Claim for Judgment Using VTR," systems using 5 referees and 4 referees were investigated.
2.The system of "Claim for Judgment Using VTR" was accepted by all concerned.
3.In case kantoku has a doubt about the yuko-datotsu, kantoku may file igi with shinpan-shunin in this system.
4.Judges check the datotsu-bui of the opponent’s kendo-gu or datotsubu with shinai using the VTR. This method bears some parallels to the instant replay system that many professional sports have adopted.
5.But if they move to checking not only datotsubu or datotsu-bui, but also checking the yuko-datotsu, the requirement of yuko-datotsu will be changed by the introduction of this system.

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　In this study, we conducted a survey of current high school baseball coaches regarding the method of player selection, which is important for both coaches and team members for successful team management. The subjects were 45 head coaches of high school baseball teams.
　The survey results revealed that the most common method of player selection was the head coach taking the initiative by listening to the thoughts and opinions of the team members, therein selecting players. Here, the head coach presents the selection criteria which all the team members should make an effort to advance and equally guarantee the opportunity to be selected as a player. An important selection criterion was high baseball skills and achievements among the players. Moreover, an attitude of the player for reliable and hard-working team practice was deemed necessary. It is considered that these selection criteria and procedures would ensure that all team members would have an opportunity to make independent efforts to create a successful baseball team. Among the targeted high school baseball teams, no team was found to select players by exchanging opinions with team members only. This is because it is very complicated and difficult to show fair and clear selection criteria and selection procedures to all of the team members, leading to difficulty in selecting players fairly in a diverse and large team. In addition, baseball is a game in which most of the technical and tactical play in the game is executed by signs from the head coach.
　Therefore, in comparison to other sports, it is considered more comfortable for both the head coach and the team members to select individual players under the guidance of the head coach. As a future research topic, it will be necessary to examine how team members feel about and evaluate the choice of players under the guidance of the head coach.

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