1995 - 2000 Worked as Network engineer for some ISPs
2000 - 2001 General manager of iDC, Livedoor
2001 - 2003 SVP of Network service, Livedoor
Mar 2004 Founder and CEO of RedSIP (VoIP startup at Bay Area)
Feb 2006 CEO of Livedoor
Jul 2006 Founder and CEO of ZEROSTART (to present)

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