Japanese Radar Equipment in WWII

Air and Surface Search Radars

Type 11

Became Operational: June 1943
War Status: used operationally in war
Installed: ground shore fixed
Purpose: anti-air
Wavelength: 300 cm
Peak Output: 40 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: aircraft, group at 250 km, single at 130 km
Weight: 8700 kg
Number Built: 30
Antennae: dipole array with mat type reflector, send and receive separate use

Type 12

Became Operational: April 1944
War Status: used operationally in war
Installed: ground movable
Purpose: anti-air
Wavelength: 200 cm and 150 cm
Peak Output: 5 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: Aircraft, group at 100 km, single at 50 km
Weight: 6000 kg
Number Built: 50
Antennae: dipole array with mat type reflector, send and receive separate use

Type 13

Became Operational: March 1943
War Status: wide operational use in war
Installed: ground, surface ship and submarine portable
Purpose: anti-air
Wavelength: 200 cm
Peak Output: 10 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 100 km, single at 50 km
Weight: 110 kg
Number Built: 1000
Antennae: dipole array with mat type reflector, send and receive. common use

Type 14

Became Operational: May 1945
War Status: used operationally in war Installed: shore line ground target type
Purpose: long range anti-air
Wavelength: 600 cm
Peak Output: 100 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 360 km, single at 250 km
Weight: 30000
Number Built: 2
Antennae: unknown

Type 21

Became Operational: August 1943
War Status: used operationally in war
Installed: surface ship
Purpose: anti-air, surface detectionr
Wavelength: 150 cm
Peak Output: 5 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: aircraft, group at 100 km, single at 70 km, surface ship (large) 20 km
Weight: 840 kg
Number Built: unknown, small number
Antennae: dipole array with mat type reflector, send and receive separate use
One source indicates only 1 set of this type built, but same source indicates it was installed on numerous ships. Type 21 first fitted to BB Ise in April 1942, Taiyo, Chuyo and Unyo in January 1943, others prior to August 1943. At least 30-40 sets built and used operationally.

Type 22

Became Operational: September 1944, see notes below
War Status: wide operational use in war
Installed: surface ships, submarines
Purpose: anti-air, surface dectection and gunnery control
Wavelength: 10 cm
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: aircraft, group at 35 km, single at 17 km, surface ship (large) 34.5 km
Weight: surface ships 1320 kg, submarines 2140 kg
Number Built: 300
Antennae: horn type, send and receive separate use
Type 22 fitted to Kazegumo and Makigumo in March 1942, Hamakaze in June 1942, Akigumo and Yugumo in July 1942, Kongo, Haruna and Hyuga in October 1942, Katori, Kashima and Kashii in June 43,Yamato and Musashi in October 1943, other destroyers prior to September 1944. In wide use by mid-to late 1944. Type 22 radard while not designed for gunnery control provided moderately accurate data for this purpose.

Airborne Search Radars

Type H-6

Became Operational: August 1942
War Status: used operationally in war
Installed: large flying boats, mid-sized attack planes
Purpose: air search and probably surface search as well
Wavelength: 200 cm
Peak Output: 3 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 100 km, single at 70 km
Weight: 110 kg
Number Built: 2000
Antennae: Yagi type, send and receive common use
This set probably did not come into commun use until 1944, and was mounted in H8K Emily flying boats, G4M2 Betty bombers, and others.

Type FM-1

Became Operational: September 1944
War Status: under preparation for practical use when war ended
Installed: four engine aircraft
Purpose: air search and probably surface search as well
Wavelength: 200 cm
Peak Output: 42 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 100 km, single at 70 km
Weight: 70 kg
Number Built: unknown
Antennae: Yagi type, send and receive common use

Type N-6

Became Operational: October 1944
War Status: experimental use
Installed: single engine 3 seat aircraft
Purpose: air search and probably surface search as well
Wavelength: 120 cm
Peak Output: 2 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 70 km, single at 50 km
Weight: 60 kg
Number Built: 20
Antennae: Yagi Type, send and receive common use

Type FM-3

Became Operational: June 1945
War Status: under preparation for practical use
Installed: single engine 3 seat aircraft
Purpose: air search and probably surface search as well
Wavelength: 200 cm
Peak Output: 2 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 70 km, single at 50 km
Weight: 60 kg
Number Built: 100
Antennae: Yagi Type, send and receive common use

Search and Gunfire Control Radars

Type 41

Became Operational: August 1943
War Status: used in war
Installed: ground anti-aircraft artillery
Purpose: anti-aircraft gunfire control
Wavelength: 150 cm
Peak Output: 13 kw
Transmitter: ring parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 40 km, single at 20 km
Weight: 5000 kg
Number Built: 50
Antennae: dipole array with mat type relector, send receive separate use

Type 42

Became Operational: October 1944
War Status: used in war
Installed: ground anti-aircraft artillery
Purpose: anti-aircraft gunfire control
Wavelength: 150 cm
Peak Output: 13 kw
Transmitter: ring parallel two wire Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 40 km, single at 20 km
Weight: 5000 kg
Number Built: 60
Antennae: Yagi type, send and receive separate use

Type 43

Became Operational: July 1945
War Status: used in war
Installed: ground searchlight units
Purpose: searchlight control
Wavelength: 150 cm
Peak Output: 13 kw
Transmitter: ring parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group and single at 40 km
Weight: 500 kg
Number Built: 121
Antennae: Yagi type, send and receive separate use

Type 23

Became Operational: March 1944
War Status: not used
Installed: surface ships cruiser or larger
Purpose: anti-surface ship gunfire control
Wavelength: 60 cm
Peak Output: 5 kw
Transmitter: cavity resonance
Receiver: 2400
Detector: n/a
Detected: small surface ships 13 km
Weight: 1000 kg
Number Built: unknown
Antennae: parabola, send and receive common use

Type 31

Became Operational: March 1945
War Status: under preparation for practical use
Installed: ground shore batteries, surface ship cruiser size or larger
Purpose: anti-surface ship gunfire control
Wavelength: 10 cm
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: large surface ships 35 km
Weight: 1000 kg
Number Built: unknown
Antennae: parabola, send and receive common use

Type 32

Became Operational: September 1944
War Status: under preparation for practical use
Installed: ground shore batteries, heavy cruisers and battleships
Purpose: anti-surface ship gunfire control
Wavelength: 10 cm
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: large surface ships 30 km
Weight: 5000 kg
Number built: 60
Antennae: square horn, send and receive separate us

Type 33

Became Operational: August 1944
War Status: not used
Installed: surface ships
Purpose: anti-surface ship gunfire control
Wavelength: 10 cmr
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: small surface ship 13 km
Weight: 800 kg
Number Built: unknown
Antennae: round horn, send and receive separate use

Airborne Intercept Radars

FD-2

Became Operational: August 1944
War Status: not used
Installed: night fighters
Purpose: airborne detection and approach
Wavelength: 60 cm
Peak Output: 25 kw
Transmitter: cavity resonance
Receiver: 2400
Detector: n/a
Detected: aircraft 3 km, surface ship 10 km
Weight: 70 kg
Number Built: 100
Antennae: Yagi type, send and receive separate use

TAMA3

Became Operational: July 1945
War Status: under preparation for practical use
Installed: night fighters
Purpose: airborne detection and approach
Wavelength: 200 cm
Peak Output: 3 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft 3 km
Weight: 70 kg
Number Built: 10
Antennae: send and receive common use

Radar Guidance Units (Navigational and Detection Radar)

Type 61

Became Operational: April 1945
War Status: under preparation for practical use
Installed: important ground area
Purpose: enemy aircraft height and position measurement
Wavelength: 60 cm
Peak Output: 10 kw
Transmitter: shielded oscillator
Receiver: 2400
Detector: n/a
Detected: single aircraft 130 km
Weight: 15000 kg
Number Built: 1
Antennae: parabola, send and receive common use

Type 62

Became Operational: June 1945
War Status: under preparation for practical use
Installed: important ground area
Purpose: friendly aircraft position measurment
Wavelength: 200 cm
Peak Output: 10 kw
Transmitter: parallel two wir
Receiver: UN-954
Detector: n/a
Detected: single aircraft 100+ km
Weight: 3000 kg
Number Built: 1
Antennae: dipole array, send and receive common use

Type 63

Became Operational: unknown, possibly never
War Status: under preparation for practical use
Installed: important ground area
Purpose: long distance enemy position measurement
Wavelength: 300 cm
Peak Output: 40 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: single aircraft 160 km
Weight: 8700 kg
Number Built: 1
Antennae: dipole array, send and receive common use

TH

Became Operational: July 1945
War Status: not used
Installed: shore installations
Purpose: apecial attack boat guidance
Wavelength: 150 cm
Peak Output: 13 kw
Transmitter: ring parallel two wire
Receiver: UN-954
Detector: n/a
Detected: small surface ship/attack boat less than 20 km
Weight: 500 kg
Number Built: unknown
Antennae: diplose array, send and receive common use

M-13

Became Operational: June 1945
War Status: not used
Installed: all types of aircraft
Purpose: IFF general aircraft use
Wavelength: 200 cm
Peak Output: 0.05 kw
Transmitter: coil and capacitor
Receiver: UN-955
Detector: n/a
Detected: 100 km from a small surface ship/attack boat
Weight: 10 kg
Number Built: 100
Antennae: bendback 1/4l

Type 51

Became Operational: unknown, possibly never
War Status: not used
Installed: four engine bombers
Purpose: navigational?, target detection?, large bomber use
Wavelength: 10 cm
Peak Output: 6 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: unknown, possibly earth or ocean surface, 20 km
Weight: 200 kg
Number Built: unknown
Antennae: parabola, send and receive common use

FH-1

Became Operational: February 1945
War Status: used in war
Installed: large flying boat
Purpose: low altitude radio altimeter
Wavelength: 88 cm
Peak Output: 0.0001 kw
Transmitter: parallel two wire
Receiver: UN-955
Detector: n/a
Detected: earth or ocean surface .015 km
Weight: 30 kg
Number Built: 100
Antennae: double T

E-27

Became Operational: April 1944
War Status: used in war
Installed: torpedo attack boat
Purpose: ESM warning indicator
Wavelength: 75-400 cm
Peak Output: n/a
Transmitter: n/a
Receiver: UN-955
Detector: n/a
Detected: enemy radar/radio use 300 km
Weight: 40 kg
Number Built: 2500
Antennae: unknown

unknown type

Became Operational: unknown, probably never
War Status: unknown, probably not used
Installed: ground, surface ship
Purpose: ESM warning indicator
Wavelength: 3-75 cm
Peak Output: n/a
Transmitter: n/a
Receiver: unknown
Detector: n/a
Detected: enemy radar/radio use unknown range
Weight: unknown
Number Built: 200
Antennae: unknown

FT-B

Became Operational: May 1944
War Status: under preparation for practical use
Installed: bomber and reconnaissance aircraft
Purpose: airborne ESM warning indicator
Wavelength: 45-370 cm
Peark Output: n/a
Transmitter: n/a
Receiver: UN-955 x 2
Detector: n/a
Detected: enemy radar/radio use 300 km
Weight: 20 kg
Number Built: 300
Antennae: unknown

FT-C

Became Operational: May 1944
War Status: under preparation for practical use
Installed: bomber and reconnaissance aircraft
Purpose: airborne ESM warning indicator
Wavelength: 45-370 cm
Peark Output: n/a
Transmitter: n/a
Receiver: UN-955 x 2
Detector: n/a
Detected: enemy radar/radio use 300 km
Weight: 20 kg
Number Built: 100
Antennae: unknown

Totals:

30 different types of sets
7256+ sets of all types built
While clearly the Japanese radar effort was late in coming and far less effective than that of the Allies, it was a far cry from nothing.

Army Radar Development and Training Groups

Tama Army Technology Research Institute formed 11 June 43 for radar research.
Army Radio Wave Training Unit formed 12 Feb 44 for training radar operators.
Army Radio Wave Weapons Training Department revised 28 Apr 45.
1st Radio Wave Guidance Unit formed 12 Jun 45.

Sources:

The Imperial Japanese Navy, AJ Watts and BG Gordon Senshi Sosho: Rikugun Gunsenbi (Army War Preparation)
A technical reference on WW II radar whose name I can't find at the moment, data provided by one of my research team and I'll have to have him check the book name (Martin Favorite, August, 1996).