• 七ななつ — seven (traditional counting)
• 七日なのか — seventh day; seven days
• 七曜しちよう — the seven celestial bodies / days of the week
• 七夕たなばた — Tanabata festival
• 七福神しちふくじん — the Seven Lucky Gods
• 七五三しちごさん — traditional children's festival

七 is one of the basic number kanji. It is often read as しち, but なな is commonly used in daily speech to avoid confusion with いち (one).