The People, Citizens, National
noun
The country peoples are the people of your country. They are the people.
こくみん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
私は、日本の国民です。
I am a Japanese citizen.
365日全てを休みにするというのは、国民のアイディアでした。
It was the people's idea to make all 365 days holidays.
八月十日は山の日です。山の日は、日本の国民の休日です。
August 10th is Mountain Day. Mountain Day is a holiday for Japanese nationals.