Fact · Languages and accents
Japanese government guidance on public writing (2022) says a single document must use one comma style throughout.
Checked against its source on October 17, 2026
In the source's own words
“ただし、一つの文書内でどちらかに統一する。”
公用文作成の考え方 (Guidelines for Writing Official Documents), Agency for Cultural Affairs, Japan (Bunka-cho), 2022, 符号 (punctuation), section 5(1)a.
Open the original- What it measures
- The guidance allows the full-width comma in horizontal writing, and asks writers to keep one style within a document.
- What it does not show
- The rule is about consistency within one document; it does not forbid either comma.