A versatile open-source project with multiple weights, including very thin versions that mimic the W1 look.
You can purchase a license to use the font legally from official resellers or the foundry. This is the correct route for professional design work. hiragino sans w1 font free download
Expect to pay between for a standard desktop license, depending on the number of weights and users. Yes, Japanese fonts are expensive because they contain thousands of Kanji characters. hiragino sans w1 font free download