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Daniel C. Siu

Founder and CEO

Mr. Siu is the founder and CEO of Rainbow Genomics. He brings 28 years of experience in genetics and life science business to the company.  

Prior to Rainbow, Mr. Siu co-founded Nextcode Health, a bioinformatics company spun off by Amgen and deCODE Genetics.  Nextcode was acquired by WuXi for US$65M after one year in operations.   Prior to Nextcode, Mr. Siu co-founded Axeq Technologies.   Axeq subsequently merged its 200 client accounts with Macrogen, to become the world's largest next-generation-sequencing service provider.  From 2005-2011, he was the managing director at deCODE Genetics, growing their genomic services business into a market leader worldwide.  

Mr. Siu received his B.S. in molecular biology from the University of Texas, Austin; his M.S. in bioinorganic chemistry from the University of Minnesota, Minneapolis; and his MBA from San Francisco State University. 


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Yasushi Okazaki, M.D, Ph.D.

chief medical officer

Dr. Okazaki is a pioneer and a leader in using precision medicine and next-generation-sequencing tests for hereditary disorders and tumor care in Japan.  He currently holds multiple positions -

Dr. Okazaki is the head & professor of Diagnostics and Therapeutics of Intractable Diseases, Graduate School of Medicine, & the Intractable Disease Research Center, at Juntendo University.  

In addition, Dr. Okazaki is the facility director of RIKEN Genome Network Analysis Support Facility leading their research DNA sequencing efforts.

He is also a visiting professor at the Research Center for Genomic Medicine, Saitama Medical University.

Dr. Okazaki is a pioneer in Japan using genomics technologies in clinical care, including the applications of whole exome sequencing in pediatric and emergency neonatal care, and cancer panel sequencing for tumor profiling.  He also leads multiple cancer screening projects for Japanese patients.  Dr. Okazaki is frequently interviewed by the Japanese media and corporations, on current practices of precision medicine and how it may impact the Japanese society.

Dr. Okazaki received his M.D. from Okayama University Medical School, and his Ph.D. from Osaka University Medical School.