UPDATE 1-Toyota to supply hybrid parts to Mazda -Nikkei

*Parts for Mazda's planned hybrid car as early as 2013-Nikkei

*Toyota to gain revenue, economies of scale -Nikkei

*Negotiations in final stage, announcement soon -Nikkei (Updates with details)

TOKYO, July 16 (Reuters) - Japanese automaker Toyota Motor Corp (7203.T) plans to supply core components for hybrid vehicles to smaller rival Mazda Motor Corp (7261.T), the Nikkei business daily reported on Thursday.

The components will be used in a hybrid vehicle Mazda is planning to launch as early as 2013, the Nikkei said.

Under the deal Toyota will supply batteries, motors, control units, and other components made by group parts makers to Mazda, the Nikkei said.

Mazda approached Toyota with the request for the hybrid components, the Nikkei said, adding that an announcement of the alliance is expected soon. (Reporting by Nathan Layne; Editing by Edwina Gibbs)