mixi 1. SNS 4 SNS SNS SNS 2003 3 Friendster http://www.friendster. com/ 2004 1 orkut http://www.orkut.com/ Google 2 2005 SNS Friendster an online service that helps you connect with your friends and discover new friends and interests. SNS 2004 2 GREE http://www.gree.jp/mixi http://mixi.jp/ mixi 2005 2004 3 600 4 4,300 5 10,000 6 21,000 7 36,000 8 56,000 9 81,000 10 118,000 11 157,000 12 207,000 2005 1 257,000 2 328,000 3 402,000 4 494,000 5 588,000 6 708,000 7 843,000 8 1,000,000 : 1 2004 4 10 100 91
2004 mixi 2005 8 100 1 SNS b SNS c SNS mixi http://mixi.jp/about.pl SNS 3. 546 94.5 515 SNS Q2 mixi 2 515 1 F1 32.2 SD 8.6 2. 18 72 1 1 selfselection SNS 546 mixi GREE 10 4.220 28.8 20 30.330 19.630 8.740 3.840 1.550 3.1 2005 F2 322 193 63 2 2005 2 28 3 14 15 2005 a SNS SNS SNS SNS 55.2 44.8 2005 SNS 1. mixi 515 94.3 2. GREE 152.8 3. 162.9 546 100.0 92
23 1. 121 2. 89 3. 31 4. 28 5. 62 6. 67 7. 24 8. 82 9. 11 515 1. 269 2. 71 3. 137 4. 24 5. 14 515 2F3 57 3 F4 4 2 mixi Q5 mixi 63 16 mixi Q4 2004 8 25.0 13 4 96 Q6mixi 93
67 31 98 2005 2 Q7 8 1 711 1 2 23 94 mixi 3 1 7 mixi 5 1 43 3 Q9mixi 5 mixi 3 mixi mixi 4 a mixi 4 7 8 10b 9 11 12c 1 2 3 4d 5 6 4 ac 2 Q10 11 mixi 14 abc d ef gh i jk 3 lm n 3 3 94
23 mixi 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 474 92.0 433 84.1 416 80.8 396 76.9 374 72.7 251 48.7 201 39.2 165 32.2 69 13.4 58 11.4 49 9.5 34 6.6 a b c d e f a b c d e a b c d e a b c d e : 4 11.5 40.8 34.8 13.0 38.4 24.5 18.618.5 95
6 3 3 Q12mixi 2 36.543.5 80.0 3.5 16.5 Q13 17 490 90 1 54 46 2 40.45 df 9, p.01 45 1 81 1 2 39 3 4 1 34 1 10 8 1 322 3 301 1 1. 2. 2, 3 3. 1 4. 1. / 18 8 7 5 38 2. 1,2 / 74 57 27 30 188 3. 1 / 42 58 39 25 164 4. 1 15 18 8 11 52 5. 6 7 5 21 39 155 148 86 92 481 : p.05 96
23 18 8 8 2 49.08 df 12, p.01 7 mixi Q18 19 mixi 1000 21 4mixi 2005 2005 2 36 8.8 61 39 Q20 23 5 mixi 110,000 2005 8 225,000 36 2005 10.8 3 289 56 226 1 86 2 44 3 34 4 15 5 11 5 84 78 62 60 3 97
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. SNS 11. 401 77.7 319 61.9 310 60.2 181 35.2 112 21.8 102 19.8 98 19.0 75 14.6 68 13.2 60 11.7 13 2.5 1. 376 73.0 2. 363 70.5 3. 151 29.3 4. 127 24.7 5. 109 21.1 6. 63 12.2 7. 60 11.7 8. 44 8.5 9. 35 6.8 10. 23 4.5 72.4 8 2005 8 5 32,141 27,737 24,446 ipod User s 23,216 Photoshop 22,142 3 a : b : c : 9 70 1 12 mixi Q24 mixi 65.8 49.6 a b c 3 mixi Q25mixi 3 10 98
23 mixi 1. 2. 3. 4. mixi 5. 6. 7. 8. 9. 10. 11. 12. mixi SNS 13. 14. 15. mixi SNS 353 68.5 317 61.6 281 54.6 233 45.2 224 43.5 187 36.3 156 30.3 154 29.9 150 29.1 98 19.0 85 16.5 69 13.4 63 12.2 53 10.3 32 6.2 3 a SNS b c SNS mixi 10.19 SD 14.16 5.0 JMP CART5 Q24 mixi mixi N 67 21.14 N 449 8.58 mixi : : 1 27.6 N 41 mixi : Q18 : 45 : 69 mixi : 4.1 N 133 mixi mixi 99
cf. SSM 1995 SD SD 1. 3.15 0.853.58 0.65 2. 2.51 0.852.94 0.82 3. 2.34 0.872.36 0.82 4. 2.89 0.802.94 0.83 5. 2.47 0.882.38 0.90 6. 2.46 0.892.33 0.82 7. 2.11 0.872.05 0.79 8. 2.08 0.822.39 0.88 : 4 SSM 1995http://ssjda.iss.u-tokyo. ac.jp/chosa-hyo/0260c_b.html t p.01 SD cf. 1. 4.07 0.82 4.01 3.95 2. 3.93 0.84 4.04 3.79 3. 3.86 0.75 3.67 3.54 4. 3.68 0.78 3.93 4.08 5. 3.46 0.74 2.65 2.41 6. 3.35 0.69 3.05 2.92 : cf. 1998 N 167 N 39 3 SNS SNS Q26 4 a 3.58 SD 0.61b 3.58 SD 0.59 2 2 SSM N 2,630 SNS 4 Q28SNS SSM2000 8 11 Q29 100
23 200 38.8 315 61.2 1997 Q30 6 1998 5 4.07 12 3.35 1998 4.01 3.95 3.05 2.91 4. SNS SNS SNS 2003 KKK 2005 SNS mixi 100 Online http://www.emercur y.co.jp/ press/050803.html 2005 2000 5 Pp. 3 53. 1997 Pp. 104 116. 101
2005 SNS mixi Online http://www8.plala.or.jp/revir/sns/ 2005 22 Online http://wwwsoc.nii.ac.jp/jsicr/2005/ 2005tai-pdf/MoriYuji.pdf 1998 2003 : SNS 10 18 18 SNS 18 18 19 20 20 20 20 20 21 21 21 21 21 SNS 21 SNS 21 21 22 22 SNS 22 22 22 22 22 SNS 22 23 23 SNS 23 SNS SNS 102
23 23 23 SNS 23 23 24 24 SNS 24 24 24 24 25 25 25 25 25 25 25 25 SNS 25 25 25 25 26 26 26 26 26 26 2 Yahoo! 26 26 26SNS 26 26 26 26 103
26 27 27 100 27 27 SNS 27 27 SNS SNS 27 27 28 28 SNS 28 28 28 28 28 28 28 SNS 28 29 SNS 29 SNS A SNS A B A 29 29 SNS SNS 29 2929 29 29 Blog SNS HP mixi SNS 29 SNS 104
23 29 29 29 29 29 12 SNS SNS 29 SNS 29 29 29 29 30 GREE mixi 30 30 SNS BBS 3030 30 SNS 30 SNS SNS 30 30 SNS 30 30 SNS SNS SNS 30 SNS 30 30 31 31 31 31 105
Web SNS 31 31 web HP SNS 31 SNS 31 31 32 32 mixi 32 32 SNS 32 32 32 32 32 2 32 32 32 2ch 32 33 33 33 mixi 33 mixi SNS 33 33 33 34 34 34 SNS 34 SNS 34 SNS SNS 34 35 35 SNS 106
23 35 SNS 35 35 SNS 35 36 10 36 36 HP 36 SNS 36 1 36 36 36 36 36 37 37 SNS 37 SNS 37 37 37 ID 37 SNS 37 give&take 37 37 38 @nifty SNS 38 38 SNS 38 38 38 39 39 107
39 39 39 39 SNS 39 39 40 SNS 40 40 18 17 40 SNS 40 40 40 40 41 41 41 41 41 41 41 41 41 41 41 42 42 42 42 42 1 1 108
23 42 42 42 43 IT 43 SNS 43 43 43 44 SNS 44 44 1 SNS 44 44 44 44 44 44 44 40 45 46 46 47 SNS SNS 47 48 48 SNS SNS 48 48 2ch 48 50 109
52 SNS 55 56 56 57 SNS 59 63 72 110