While I have seen a few iterations of this basic idea, they all use Arabic or dot symbols for the faces of the 20-sided die. I modeled this from scratch in Blender, using a free Epson kanji font to shape the digits.
Since there are a few tiny differences in how Chinese hanzi are stroked vs how Japanese kanji are typically done, I have also included a modified version of the bowl that draws the "8" digit (八) in the Chinese style also.
d20-hanzi-bowl.stl | 1.8MB | |
d20-kanji-bowl.stl | 1.8MB | |
d20-kanji-lid-h-k.stl | 690.1KB |