The Japanese word for counting 10 people is juunin (十人).
Here's a breakdown of how to count people in Japanese, as shown in the reference material, which uses the counter nin (人):
| Number of People | Japanese | Pronunciation |
|---|---|---|
| 1 | 一人 | hitori |
| 2 | 二人 | futari |
| 3 | 三人 | sannin |
| 4 | 四人 | yonin |
| 5 | 五人 | gonin |
| 6 | 六人 | rokunin |
| 7 | 七人 | shichinin or nananin |
| 8 | 八人 | hachinin |
| 9 | 九人 | kyuunin |
| 10 | 十人 | juunin |
The reference points out that you might hear a maitre d' saying “O- futari san desu ka?”, meaning “Table for two?”, demonstrating the use of "futari" for "two people".
Therefore, to count 10 people you would say juunin (十人).
