Adobe licenses Hiragino Sans for Creative Cloud subscribers. When you activate Adobe Fonts, it will sync to your computer (even on Windows). You can then use it in any app.
It looks like you're trying to find a download for Hiragino Sans W0 — a specific weight/version of the Hiragino Sans typeface commonly used on macOS and iOS. hiragino sans w0 font free download
The font is already installed. Look in for: Adobe licenses Hiragino Sans for Creative Cloud subscribers
Here’s an honest breakdown of the situation, including why it's hard to find as a "free" download and what you should actually do. hiragino sans w0 font free download