An Intensive Analysis on the Usage Situation of the Mobile Services in Japanese High Schools . Why and How Are They Used? Tadashi OkadaɹGraduate School of Science and Engineering, Ibaraki Uni-versity Jun IioɹDept. of Socio-informatics, Faculty of Letters, Chuo Uni-versity Yoshihiko KubotaɹFaculty of Education, Utsunomiya University Tatsuhiro YonekuraɹCollege of Engineering, Ibaraki University 1

"HFOEB 
 • Introduction • Investigation summary • Service and the use of the application • Encounter from service to lead to "an encounter", and to feel • Summary 2

Introduction 3

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d 5IFOVNCFSPGUIF EBNBHFNJOPST In the community site, (54.9%) is less than 15 years old more than half of the minority. 5PUBM The source: About the present conditions and the measures of the criminal offense to be caused by dating site in 2013 and the community siteʢThe National Police Agencyʣ ZFSTPME ZFSTPME d 5PUBM 4/4 DPNNVOJUZ4JUF FUD EBUJOH4JUF OVNCFSPGUIF EBNBHFNJOPST OVNCFSPGUIF EBNBHFNJOPST XPNBO NBO XPNBO NBO 3BUJPPGWJDUJN ZFBSTPSZPVOHFS 3BUJPPGWJDUJN ZFBSTPSZPVOHFS 5IFOVNCFSPGUIF EBNBHFNJOPST Toll 15 years or younger dating sitesɾɾɾɾɾɾɾɾ60ʢ37.7%ʣ SNS,community sitesɾɾɾ710ʢ54.9%ʣ In the community site, damage 11 years or younger of the minority occurs 9

*OUSPEVDUJPO • The majority that is arrested of the cybercrime a minor (18 years old or younger) • There are many an arrest and crimes about the sexual crime • The use of the community site (including SNS) leads to a crime as a place of the encounters if meet-a-mate • The use terminal is connection from a cell-phone and a smartphone • A minor occupies most number of people of the crime in women • Among minors, the crime of the high school student greatly 10

*OUSPEVDUJPO The crime of a sexual crime and the murder case is really taking place, too 11

*OUSPEVDUJPO • It really becomes the communication means for crimes 12

*OUSPEVDUJPO A crime that the criminal killed a victim, but also a crime to greatly damage by honor is taking place Facebook 
 ɹˣ After a case ɹˣ Revenge porno 13

*OUSPEVDUJPO To prevent a future crime It is necessary to check the use actual situation of the cell-phone of the high school student and the smartphone. Therefore I investigated it. 14

Investigation summary 15

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Service and the use of ɹɹɹɹɹɹthe application 19

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5IFOVNCFSPGLFZXPSEFYUSBDUJPOPGUIF SFBTPOUIBU*XBOUUPVTF fun and interesting Convenience Need communication friend information music 22

You used it, and did you feel that it was dangerous? 23

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5IFBQQMJDBUJPOUIBU*UIPVHIUUPCFEBOHFSPVT UIFSFBTPOPGUIFTFSWJDF The most of the problem are troubles by the communication Bad-mouths almost encountered bullying I almost had money stolen I was almost kidnapped by a person I almost encountered a stoker A message comes persistently A message comes persistently I was threatened by one's contributio ns A reply became slow and became unfriendly with a friend Others 25

The use of SNS 26

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0OFNPTUCZUIFVTFPGUIFTFSWJDFJT5XJUUFS There are a lot of cases to become the problem 29

#BLBUUFSʢόΧολʔʣʢ'PPMʴ5XJUUFSʣ Laying upon word of "fool" and "Twitter " I tweet for the illusion that I appeal, and only a friend sees for an aim that wants to be outstanding. As for the tweet contents, a large body is a criminal act . There are many cases that such a tweet becomes the social problem . There were the cases that a company and the owner of the shop who hired a parttimer were driven into the business closing . As a common twee t Drinking of the minorit y Driving without a licens e Pride of the crime 30

#BLBUUFSFYBNQMF To a planned person doin g "I enter the track" from now on When "I was going to delete the contribution immediately, I did not disappear and did retweet steadily and was surprised" 31

#BLBUUFSFYBNQMF In addition, Bakatter goes down in a track; and a design of the photography 32

#BLBUUFSFYBNQMF 33

Then does the high school student do Bakatter? How long does the student seem to do it? 
 
 I heard it 34

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Encounter from service to lead to "an encounter", and to feel 37

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5IFTFSWJDFUIBUJOUFSDIBOHFTXJUIPUIFSQFPQMF SSocial games such as mobage or GREE mix i ɹLIN E ɹOthe r 39

*NFUBQFSTPOOPUUPLOPXVTJOHTFSWJDFT TVDIBT4/4 I have interchanged with "a person not to know" :FT /P /P BOTXFSFE :FT /P /P BOTXFSFE 40

5IFTFSWJDFUIBUSFBMMZNFUBQFSTPOOPUUPLOPX SSocial games such as mobage or GREE mix i ɹLIN E ɹOthe r 41

3FBMMZNFFUBQFSTPOOPUUPLOPX :FT /P Did you develop into love? 42

*NQSFTTJPOPGUIFQBSUOFS "DDPSEJOHUPJNBHF "OJNBHFJTTMJHIUMZOFBS *DBOOPUTBZ ZFTPSOP *UJTTMJHIUMZGBSGSPNBOJNBHF *UJTGBSGSPNBOJNBHF I really met a partner, and how was the impression? 43

"HFPGUIFQFSTPOXIPNFU I do not understand it generations 10s 20s 30s 40s 50s 60s 44

Summary 45

4VNNBSZ5IFQSFTFOUDPOEJUJPOT • The use of the smartphone is communication mainly • The main use is narrowed down to Twitter and LINE • With the others who do not know it by sight with planning communication using SNS can interface it 46

4VNNBSZ5IFQSFTFOUDPOEJUJPOT • The student uses the service that information can send to unspecified number of the general public such as Twitter for the sense that only a fellow thinker sees • An encounter comes out of interchange with the unspecified number of the general public in Twitter • It is difficult to ascertain a partner with the malice (because inexperienced as experience) 47

4VNNBSZ5IFQSFTFOUDPOEJUJPOT • When a partner is false, there is the risk that watches Twitter, and approaches, and is rolled up in a crime • There is the risk to be connected by the method called the communication that is a secret room using LINE for an evil deed after having approached • Concealment communication not to understand is completed from a parent and a school 48

4VNNBSZ.FBTVSFT • I wear a scary sense to protect the body because I stayed to meet because a murder case of Mitaka was scary • Because there are not checks such as the age, in SNS such as Twitter, do not give the partner who can hide birth and parentage information • I instruct a challenger that there is not it to get attention easily • Have a fear toward a person to approach • Are structure and an action to prevent you from becoming concealment communication not necessary? 49

Thank you for listening 50