AI assistants most often recommend Rakuten Securities for stock trading apps in 🇯🇵 Japan (日本語), naming it in 67% of the buyer questions we tested, followed by auカブコム証券 and SBI証券. We asked an AI model the questions buyers ask about stock trading apps 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 | Rakuten Securities | 4/6 (67%) |
| 2 | auカブコム証券 | 4/6 (67%) |
| 3 | SBI証券 | 2/6 (33%) |
| 4 | SBI Securities | 2/6 (33%) |
| 5 | moomoo | 1/6 (17%) |
| 6 | Robinhood | 1/6 (17%) |
| 7 | 楽天証券 | 1/6 (17%) |
| 8 | Rakuken Securities | 1/6 (17%) |
| 9 | SBI証券アプリ | 1/6 (17%) |
| 10 | MATSUMOTOアプリ | 1/6 (17%) |
| 11 | GMOクリック証券 | 1/6 (17%) |
| 12 | LINE証券 | 1/6 (17%) |
| 13 | Yahoo!ファイナンス | 1/6 (17%) |
| 14 | ラクーン | 1/6 (17%) |
| 15 | ネットトレード | 1/6 (17%) |
Method: 6 representative buyer questions via a large language model, 🇯🇵 Japan (日本語). Updated 8/14/2026. A proxy for how AI assistants describe this category.
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