The original developer is JiyuKobo. You can license the font officially through Screen Holdings.

We apologize for the inconvenience caused by the HGP Mincho B font download issue and are pleased to announce that the problem has been resolved. The font is now available for download, and we hope that users will continue to find it a useful and reliable tool for their work. If you have any questions or issues with the font download or installation, please do not hesitate to contact us.

: Official licenses for desktop or web use can be found on professional foundries like 2. Legal Alternatives (Free/Open Source)