Nakajima B5N2/B6N1-2 ("Kate")/Tenzan ("Jill"): In 1944, some torpedo bombers of mentioned types used with antisubmarine, radar detection (with finding radar equipment) and similar purposes in short- or medium-range maritime search missions from carriers or land bases.
Aichi E13A1b ("Jake") Mark 11B:how model 11A, added surface-search radar and other night conversion with radar (E13A1b-S)
Kawanishi H6K2,4, and 5 "Mavis" Marks 11, 22, and 23:more powerful engines, for ultra long range missions, long range sea radio equipment and surface-search radar added.
Kawanishi H8K2 ("Emily") Mark 12:More potent engines for ultra-long range maritime recon missions, major heavy armament; also long range sea radio equipment and air-surface search radar added.
Kyushu Q3W1 Nankai (South Sea): two place version of training aircraft Kyushu K11W1 Shiragiku, for antisubmarine patrol. Equipped with sea-surface finding antisubmarine sonar (one prototype)
Kyushu Q1W1 Tokai (Eastern Sea; "Lorna"): Antisubmarine patrol aircraft. Equipped with surface-search radar and antisubmarine equipment for escorting convoys in the East China Sea, the Yellow Sea and the Sea of Japan during short periods in 1944-45.
Mitsubishi Q2MTaiyo: advanced antisubmarine patrol design, derived from Mitsubishi Ki-67Hiryu ("Peggy"). Was equipped with magnetic antisubmarine search device, air-surface radar and electronic antennae warfare. This design did not advance past the design stage during the war.