- Titles: Shûri, Iga no kami, Higo no kami
- Japanese: 岩瀬 忠震 (Iwase Tadanari)
A page (koshô) attached to the Nishinomaru of Edo castle in 1851, Iwase was honored at that time by the shogunate along with several other officials for their work as literary and gunnery instructors.
He was promoted to metsuke in 1854, and later that year was assigned Matsumae Ezochi yô Edo toriatsukai (official handling matters relating to Matsumae/Ezo in Edo), replacing Arao Shigemasa who was being promoted to Nagasaki bugyô. By the beginning of 1855, he had been reassigned to Shimoda torishimari kakari.
- Ishin Shiryô Kôyô 維新史料綱要, vol 1 (1937), 302, 493, 499, 513, 537, 553, 604.
- Ishin Shiryô Kôyô 維新史料綱要, vol 2 (1937), 14.