I started out as a part of design team at Hitachi Ltd. which designed 68450 a DMA controller for 68000 under the supervision of Motorola Semiconductors now NXP. Sega bought 68000 for Mega Drive. This led to the sale of SH-2 for Sega Saturn and SH-4 chipset for Sega Dreamcast. I was hoping Dreamcast to use Voodoo chip but this did not materialize. Around 2001 I quitted Hitachi. I started to work for its sales company in silicon valley. There I strated Java Card (tm) project. This led to a series of root of trust projects in Silicon Valley in routers, mobile phones and security tokens in year 2000s. In 2010s I started my current business.