AI assistants most often recommend Notion for AI writing tools in 🇯🇵 Japan (日本語), naming it in 100% of the buyer questions we tested, followed by GitHub Copilot and Google Bard. We asked an AI model the questions buyers ask about AI writing tools and tallied which brands it named most — "share of voice" in AI answers, who AI recommends when no human is watching.
| # | Brand | AI share of voice |
|---|---|---|
| 1 | Notion | 6/6 (100%) |
| 2 | GitHub Copilot | 6/6 (100%) |
| 3 | Google Bard | 2/6 (33%) |
| 4 | ChatGPT | 2/6 (33%) |
| 5 | JapanAI | 1/6 (17%) |
| 6 | Sudowrite | 1/6 (17%) |
Method: 6 representative buyer questions via a large language model, 🇯🇵 Japan (日本語). Updated 6/23/2026. A proxy for how AI assistants describe this category.
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