I talked with our company attorney today. This is what he said.

Racequeen inc is the registered owner of the 2ch domain name

There is an ongoing misunderstanding between Racequeen Inc and Hiroyuki-sans company. It is unfortunate that the volunteers are also being threatened for supporting the site even when its operations are not illegal.

In the absence of any court action, it is not illegal for any party to transact business with Racequeen Inc while it resolves its issues with Hiroyuki-san's company.