Medical Volunteer Network (MVN) connects non-Japanese volunteers with clinical trials (clinical studies) conducted at P-One Clinic, a medical research center in western Tokyo.

P-One Clinic has been conducting clinical trials with Japanese volunteers since 2005 and with non-Japanese volunteers since 2011. MVN was established to make registration easier for English-speakers and to help facilitate multi-ethnic studies.

To learn more about MVN, visit our staff page. For information about upcoming trials or for other inquiries regarding volunteering, please contact us.


2018.07 Non-Japanese volunteers registered (MVN): 750
Japanese volunteers registered (P-One Club): 4800
2018.05 Non-Japanese trial participants to date: 115
Trials completed at P-One Clinic to date: 193
2013.05 MVN website launched to accelerate non-Japanese  recruitment
2012.07 P-One Clinic accredited with ISO: 9001: 2008 (UKAS) for clinical trial services
2011.09 First clinical trial with non-Japanese (Caucasian) volunteers successfully completed
2011.04  Medical Volunteer Network established to facilitate non-Japanese recruitment
2006.10 Number of registered Japanese volunteers exceeds 1000
2005.06 P-One Clinic established in Hachioji, Tokyo
P-One Club created to facilitate Japanese recruitment