We reviewed systems for integrating EVM with several companies and teams, but there were limitations to integrating EVM as-is. Therefore, we have built an environment where you can develop Smart Contracts using JavaScript. The Solidity code is not available verbatim, but most systems are identical.

It's not open source yet, but more updates are needed in various parts such as the node system. I think there are many things to check, such as security for the public.
It can be said that it is a situation where only the basic framework has been established.