Sagan Tosu (サガン鳥栖 Sagan Tosu) is a Japanese professional football club, currently playing in the J1 League. The team is located in Tosu, Saga Prefecture.
Sagan is a coined word with a couple of meanings behind it. One of its homophones is sandstone (砂岩 sagan?) in Japanese. This symbolises many small elements uniting to form one formidable object, for example as a metaphor for a team. Also, Sagan Tosu can be interpreted as "Tosu of Saga (Prefecture)" (佐賀ん鳥栖 Saga-n Tosu?) in the area's dialect. In addition, it is widely believed that the word is meant to be a pun with Italian giants Juventus although the club hasn't confirmed it.