- Born: 1752
- Died: 1828
- Other Names: 宇八郎 (Uhachirou), 敬夫 (Takao or Keifu)
- Japanese: 斎藤鶴磯 (Saitou Kakuki)
He was born in Edo, the son of a samurai of Mito han. He was named Takao or Keifu, as well as Uhachirô, but later took on Kakki as a pseudonym. He lived in Tokorozawa in Musashi province (today, Saitama prefecture), and is known in particular for his compilation of the Musashi-no banashi shohen (武蔵野話初編, "First Edition Story of Musashi Fields"), which he completed in 1815. The following year, he returned to Edo.
His other works include Onna kôkyô hochû (女孝経補注) and Kanshikô (干支考). He died in 1828, and was buried at the Jigen-ji in Sarue-machi, but when the temple was relocated to Somei Cemetery, his grave was moved as well.
- Plaques on-site at Saitô's grave at Jigen-ji, Somei Cemetery.