Saito Masaru (?? ?, 24 January 1868 – 13 April 1904), better known by his pen name Saito Ryokuu (?? ??), was a Japanese author and critic who lived during the Meiji Era.
His Dharma name was Shungyoin Ryokuu Suikaku Koji (?????????), which was chosen by Koda Rohan.