Though Ohkawa retired from GA in 1994, he did not retire from his pursuit of innovation. He continued with a variety of scientific ventures. One of the first was TOYO Technologies, but he was involved in several other notable ventures.
Archimedes Technology Group
Ohkawa started the privately funded Archimedes Technology Group with former GA scientist John Gilleland, developing new plasma-based technology to achieve separation of the radioactive components of nuclear waste for disposal. “Their proposal to DOE was favorably reviewed by the scientific community, but government funding was not realized, despite of their technical success,” said Dick Freeman and Bob Miller.