Ookuma Diamond Device (ODD) has raised approximately $27 million to develop diamond semiconductor technology aimed at clearing radioactive debris at the Fukushima Daiichi Nuclear Power Plant. The startup plans to construct a manufacturing facility by January 2025, producing diamond chips that outperform traditional silicon in harsh environments. This funding boosts ODD's total to around $45 million since its inception. Diamond semiconductors, made from methane gas, promise superior thermal management and efficiency. ODD is in discussions with over ten global clients in nuclear and aerospace sectors, positioning itself as a leader in this innovative technology.