Agent for increasing sugar concentration in sugarcane, and method of promoting sugarcane ripening using same

Disclosed is an agent for increasing sugar concentration in sugarcane which effectively increases sugar concentration and is capable of sufficiently promoting ripening; also disclosed is a method of promoting sugarcane ripening using the same. The disclosed agent for increasing sugar concentration in sugarcane contains as active ingredients (A) at least one type of compound represented by the formula below (in the formula, A represents an oxygen atom, etc., Y represents a carboxyl group in free form or salt form, R represents a halogen atom, etc., and Y and R may bond to one another and form the -C(=O)-O-CH(CH 3 )- base), and (B) an herbicide.