IPSJ SIG Technical Report 動画共有サイトにおける大規模協調的な創造活動の分析 †1,†2 †3 †1,†2 Web ・ イ ミ フ ビ イプ イプ Network Analysis of an Emergent Massively Collaborative Creation Community Masahiro Hamasaki, †1,†2 Hideaki Takeda †3 and Takuichi Nishimura †1,†2 The Web technology enables numerous people to collaborate in creation. We designate it as massively collaborative creation via the Web. As an example of massively collaborative creation, we particularly examine video development on Nico Nico Douga, which is a video sharing website that is popular in Japan. We specifically examine videos on Hatsune Miku, a version of a singing syn- thesizer application software that has inspired not only song creation but also songwriting, illustration, and video editing. As described herein, creators of interact to create new contents though their social network. In this paper, we analyzed the process of developing thousands of videos based on creators’ social networks. 1. はじめに イ ?1 ミ ?2 ミ フ イ Fischer Social Creativity 1) イ Social Creativity ミ ミ フ CG ゴリ リ イ Social Creativty イ ライ Wikipedia QA イ イ イ イ ビ イ ラ ョ イ ラ ョ Kittuer Wikipedia 2) Adamic YahooQA ャル 3) イ フ マ †1 Advanced Industrial Science and Technology †2 CREST JST, CREST †3 National Institute of Informatics ?1 http://www.nicovideo.jp/ ?2 http://www.crypton.co.jp/mp/pages/prod/vocaloid/cv01.jsp 1 c  2009 Information Processing Society of Japan Vol.2009-MUS-80 No.11 2009/5/22