Research network (links)
Foreign and domestic networks
Domestic research institutes and associations
Japanese Society for Twin Studies
http://www.eps4.comlink.ne.jp/~aasaka/twinjimu.html
Keio Twin Study
http://kts.keio.ac.jp/
University of Tokyo, Attached Secondary School of the Faculty of Education
http://www.hs.p.u-tokyo.ac.jp/
Osaka City University Graduate School of Nursing, Community Health Nursing Studies, Prof. Yokoyama’s Seminar Room
http://www.nurs.osaka-cu.ac.jp/chiiki_kango/index.html
Japan Multiple Births Association
http://jamba.or.jp/
Twin Mothers Club
http://www.tmcjapan.org/
Foreign research institutes
International Society for Twin Study(ISTS)
http://twinstudies.org/
International Network of Twin Registries(INTR)
http://www.worldwidetwins.net/
Twin study at University of Helsinki
http://wiki.helsinki.fi/display/twineng/Twinstudy
Australian Twin Registry(ATR)
http://www.twins.org.au/
King’s College LONDON
http://www.twinsuk.ac.uk/