Rai Sahasi II (Sinhasena) (Sindhi: راجا راءِ سهاسي), was the last Buddhist ruler of the Rai dynasty of the Sindh in first half of 7th century AD. The Emperors of Rai dynasty were great patrons of Hinduism and Buddhism. This is consistent with the historical accounts from the times of Emperor Ashoka and Harsha, as numerous monarchs from the Indian Subcontinent never sponsored a state religion and usually patronized more than one faith. He succeeded his father Sinharus (Rai Sahiras II) and his empire extended up to Kashmir.
His reign ended in 632 AD. He was succeeded by his Hindu Brahmin chamberlain, Chach of Alor, who developed illicit sexual relations with Sahasi's wife (queen Rani Suhanadi). Chach conspired with Rani Suhanadi and killed Raja Sahasi II and his brothers were sent to prison. Chach was married with the queen and became ruler of Sindh ending the rule of the Rai Dynasty and starting a line of Brahmin ruler-ship.