Hiro Saga (嵯峨浩, Saga Hiro^?, 16 April 1914 – 20 June 1987) was a Japanese noblewoman. She was the daughter of Marquis Saneto Saga and a distant relative of the Shōwa Emperor. She was married in 1937 to Pujie, the younger brother of Puyi, the Last Emperor of China from 1908–1912 and the puppet emperor of Manchukuo from 1934–1945. After her marriage to Pujie, she was known as, and identified herself as, Aisin-Gioro Hiro (愛新覺羅•浩) or Aixin-Jueluo Hao in Chinese.

The Saga family was of the kuge court nobility and a branch of the Ogimachi Sanjo branch (正親町三条家) of the northern Fujiwara lineage (藤原北家). Saga was born in Tokyo in 1914 as the eldest daughter of Marquis Saneto Saga (嵯峨実勝). She was educated at the women's branch of the Gakushuin Peers' School.

In 1936, Saga was introduced to Pujie, the younger brother of Puyi, the ruler of Manchukuo. Pujie was then attending the Imperial Japanese Army Academy. Saga and Pujie were wed in an arranged marriage. Pujie had selected her photograph from a number of possible candidates vetted by the Kwantung Army. As his brother Puyi did not have a direct heir, the wedding had strong political implications, and was aimed at both fortifying relations between the two countries and introducing Japanese blood into the Manchu imperial family.

The engagement ceremony took place at the Manchukuo embassy in Tokyo on 2 February 1937 with the official wedding held in the Imperial Army Hall at Kudanzaka, Tokyo on 3 April. In October, the couple moved to Hsinking, the capital of Manchukuo. They had two daughters and what appeared to be a happy marriage.

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