Three. From the Janome website: "In Japanese, the word Janome (pronounced Ja-NO-me) means "eye of the snake." The company earned the name in the 1920s when founder Yosaku Ose, a pioneer in Japanese sewing manufacturing, began to use a round metal bobbin system instead of the traditional long shuttle. The Japanese thought the new round bobbin looked like a snake's eye, and from the innovative design, a name was born."
All you need to remember is 'Janome is to love me' 8)