Good fortune, happiness, or blessing; a concept/character commonly used in festivals, talismans, and idiomatic expressions.
正月に『福』の字を飾る家が多い。
Many households decorate the character '福' at New Year.
福袋には毎年いろいろな商品が入っている。
Lucky bags (fukubukuro) contain various items every year.
『福は内、鬼は外』と福を家に呼ぶ節分の掛け声が聞こえた。
You could hear the Setsubun chant 'Good fortune in, demons out' to invite fortune into the home.
彼は小さな幸運を『福』だと喜ぶ人だ。
He is someone who celebrates even small pieces of good luck as 'fortune'.