I would imagine they have a small engineering team in Japan to help give the best feedback on localization of the model outputs.
I think the bigger picture is that Japan has promoted strong support for AI companies and OpenAI in particular, and so the company wants to positively reinforce that as a model for other countries to emulate.
I think the bigger picture is that Japan has promoted strong support for AI companies and OpenAI in particular, and so the company wants to positively reinforce that as a model for other countries to emulate.