You actually got me curious enough to find out exactly how many kanji have nanori readings listed. Here’s the results:
| Kanji | Nanori | Level | Reading is Accepted? |
|---|---|---|---|
| 一 | かず | 1 | No |
| 大 | ひろ | 1 | No |
| 太 | おお | 3 | No |
| 谷 | せ | 5 | No |
| 向 | なた | 6 | No |
| 長 | は | 6 | No |
| 和 | かず | 9 | No |
| 和 | より | 9 | No |
| 陽 | はる | 12 | No |
| 豊 | とよ | 25 | No |
| 河 | こう | 26 | No |
| 河 | こお | 26 | No |
| 清 | し | 28 | No |
| 航 | わたる | 29 | No |
| 介 | すけ | 35 | No |
| 叔 | お | 36 | Yes |
| 樹 | いつき | 41 | No |
| 彩 | あや | 48 | No |
| 輔 | すけ | 52 | Yes |
| 胡 | きゅう | 53 | No |
| 駿 | はやお | 53 | No |
| 智 | とも | 56 | No |
| 菅 | すが | 58 | Yes |
There are 21 kanji with a total of 23 nanori readings. Only 3 kanji actually accept the nanori reading in reviews in levels 36, 52, and 58.