Under the reorganised structure, a new organisation, to be known as Lexus India, would stand independently from the broader Toyota presence in India, the company said in a statement.
The leadership has also been strengthened with Akito Tachibana to be the Chairman of Lexus India. Tachibana will drive the brand's growth strategy.
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Takemura will be the President of Lexus India and will lead the business, while Arun Nair will move into the role of Vice-President, overseeing operations.
Commenting on the change, Takemura said: "India is an extremely important market for Lexus. Today's announcement of a new and independent organisational structure is a signal that we intend to build a business that continues to drive growth not only in India but with India and for India."
Lexus marked its India entry in March this year with the introduction of a hybrid-focused lineup of vehicles featuring sedan ES300h, crossover RX450h, and SUV LX450d.
The company has opened four showrooms in Mumbai, Bengaluru, New Delhi, and Gurgaon.
"Lexus India's independence as a business organisation will enable the brand to build its presence as a luxury lifestyle brand and to position for growth in India, one of the world's fastest growing economies," the company said.