Eugen Pinak
@eugenpinak.bsky.social
Ukrainian who is interested in military history (mainly of Japan and Ukraine) and orders of battle.
Українець, який цікавиться воєнною історією (переважно Японії та України) і організацією армій.
My Japanese military history website: https://rikukaigun.org
Українець, який цікавиться воєнною історією (переважно Японії та України) і організацією армій.
My Japanese military history website: https://rikukaigun.org
Rikukaigun.org update.
Hiroshi Nishida's IJN Data Base of personnel, ships, regulations and organizations of the Imperial Japanese Navy:
rikukaigun.org/Nishida/0-In...
And a thread>
Hiroshi Nishida's IJN Data Base of personnel, ships, regulations and organizations of the Imperial Japanese Navy:
rikukaigun.org/Nishida/0-In...
And a thread>
November 23, 2025 at 12:15 PM
Rikukaigun.org update.
Hiroshi Nishida's IJN Data Base of personnel, ships, regulations and organizations of the Imperial Japanese Navy:
rikukaigun.org/Nishida/0-In...
And a thread>
Hiroshi Nishida's IJN Data Base of personnel, ships, regulations and organizations of the Imperial Japanese Navy:
rikukaigun.org/Nishida/0-In...
And a thread>
TO&E drawing, Japanese intermediate organization of infantry company in 1939.
More details in my blog: vijsko.blogspot.com/2025/11/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/11/to-d...
#ORBATBoys
November 6, 2025 at 7:46 PM
TO&E drawing, Japanese intermediate organization of infantry company in 1939.
More details in my blog: vijsko.blogspot.com/2025/11/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/11/to-d...
#ORBATBoys
TO&E drawing, Japanese machine-gun company (1945) - 12-guns.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
October 18, 2025 at 4:09 PM
TO&E drawing, Japanese machine-gun company (1945) - 12-guns.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
TO&E drawing, Japanese machine-gun company (1940 & 1943) - 8-guns
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
October 18, 2025 at 2:42 PM
TO&E drawing, Japanese machine-gun company (1940 & 1943) - 8-guns
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
TO&E drawing, Japanese Infantry company, Amphibious infantry regiment of the "Ocean" or "Regimental Combat Team" division, 1943-44.
The only time I've seen anti-tank rifle in 1942-45 IJA TO&Es.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
The only time I've seen anti-tank rifle in 1942-45 IJA TO&Es.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
October 16, 2025 at 5:20 PM
TO&E drawing, Japanese Infantry company, Amphibious infantry regiment of the "Ocean" or "Regimental Combat Team" division, 1943-44.
The only time I've seen anti-tank rifle in 1942-45 IJA TO&Es.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
The only time I've seen anti-tank rifle in 1942-45 IJA TO&Es.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
TO&E Japanese Infantry and Assault Companies, infantry regiment Type 1, 1945.
Type 1 regiments were for coastal defense of Japanese Islands.
Note unique squad organization in both companies.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
Type 1 regiments were for coastal defense of Japanese Islands.
Note unique squad organization in both companies.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
October 5, 2025 at 8:59 AM
TO&E Japanese Infantry and Assault Companies, infantry regiment Type 1, 1945.
Type 1 regiments were for coastal defense of Japanese Islands.
Note unique squad organization in both companies.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
Type 1 regiments were for coastal defense of Japanese Islands.
Note unique squad organization in both companies.
More details in my blog: vijsko.blogspot.com/2025/10/to-d...
#ORBATBoys
TO&E Japanese Infantry Company, infantry regiment Type 2, 1945.
Type 2 regiments were for "Mobile Striking Divisions", intended to counter-attack US forces, that landed on Japanese Islands.
Note team organization of squads.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
Type 2 regiments were for "Mobile Striking Divisions", intended to counter-attack US forces, that landed on Japanese Islands.
Note team organization of squads.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
September 29, 2025 at 7:42 PM
TO&E Japanese Infantry Company, infantry regiment Type 2, 1945.
Type 2 regiments were for "Mobile Striking Divisions", intended to counter-attack US forces, that landed on Japanese Islands.
Note team organization of squads.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
Type 2 regiments were for "Mobile Striking Divisions", intended to counter-attack US forces, that landed on Japanese Islands.
Note team organization of squads.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
From photo it's easy to see, how Taigei was intended for quick conversion into aircraft carrier for war.
To have flush flying deck one need to remove lightly build superstructure, smokestack, 2 masts + reroute smoke to side of ship. Small hangar is already present. > CV is ready.
To have flush flying deck one need to remove lightly build superstructure, smokestack, 2 masts + reroute smoke to side of ship. Small hangar is already present. > CV is ready.
September 18, 2025 at 8:31 AM
From photo it's easy to see, how Taigei was intended for quick conversion into aircraft carrier for war.
To have flush flying deck one need to remove lightly build superstructure, smokestack, 2 masts + reroute smoke to side of ship. Small hangar is already present. > CV is ready.
To have flush flying deck one need to remove lightly build superstructure, smokestack, 2 masts + reroute smoke to side of ship. Small hangar is already present. > CV is ready.
TO&E drawing of the infantry company of infantry regiment of the Imperial Japanese Army according to the 1940 and 1943 mobilization plans.
This was the standard organization of Japanese infantry during 1940-1945.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
This was the standard organization of Japanese infantry during 1940-1945.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
September 14, 2025 at 6:31 PM
TO&E drawing of the infantry company of infantry regiment of the Imperial Japanese Army according to the 1940 and 1943 mobilization plans.
This was the standard organization of Japanese infantry during 1940-1945.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
This was the standard organization of Japanese infantry during 1940-1945.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
TO&E drawing of the draft of the new organization of the infantry company of the Type “A” infantry regiment of the Imperial Japanese Army, based on the 1936 document, acquired by the Soviet intelligence.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
September 8, 2025 at 7:20 PM
TO&E drawing of the draft of the new organization of the infantry company of the Type “A” infantry regiment of the Imperial Japanese Army, based on the 1936 document, acquired by the Soviet intelligence.
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
More details in my blog: vijsko.blogspot.com/2025/09/to-d...
#ORBATBoys
Made another version of TO&E drawing of infantry company of Type “A” infantry regiment of the Imperial Japanese Army (1936), I've posted day ago.
This time I've mixed NATO and mine symbols together. Do you like it?
More details on my site: rikukaigun.org/IJA/1936_Typ...
#ORBATBoys
This time I've mixed NATO and mine symbols together. Do you like it?
More details on my site: rikukaigun.org/IJA/1936_Typ...
#ORBATBoys
September 7, 2025 at 7:08 PM
Made another version of TO&E drawing of infantry company of Type “A” infantry regiment of the Imperial Japanese Army (1936), I've posted day ago.
This time I've mixed NATO and mine symbols together. Do you like it?
More details on my site: rikukaigun.org/IJA/1936_Typ...
#ORBATBoys
This time I've mixed NATO and mine symbols together. Do you like it?
More details on my site: rikukaigun.org/IJA/1936_Typ...
#ORBATBoys
TO&E drawing of infantry company of IJA Type “A” infantry regiment (1936).
More details here: rikukaigun.org/IJA/1936_Typ...
I’ve made 2 versions: one based on NATO symbols, another based on symbols of my own design. Which version do you prefer?
#ORBATBoys
More details here: rikukaigun.org/IJA/1936_Typ...
I’ve made 2 versions: one based on NATO symbols, another based on symbols of my own design. Which version do you prefer?
#ORBATBoys
September 6, 2025 at 1:28 PM
TO&E drawing of infantry company of IJA Type “A” infantry regiment (1936).
More details here: rikukaigun.org/IJA/1936_Typ...
I’ve made 2 versions: one based on NATO symbols, another based on symbols of my own design. Which version do you prefer?
#ORBATBoys
More details here: rikukaigun.org/IJA/1936_Typ...
I’ve made 2 versions: one based on NATO symbols, another based on symbols of my own design. Which version do you prefer?
#ORBATBoys
rikukaigun.org update.
Started to build a library of useful historical sources on the Imperial Japanese military. Plan to add more in the future.
rikukaigun.org/rikukaigun-g...
Started to build a library of useful historical sources on the Imperial Japanese military. Plan to add more in the future.
rikukaigun.org/rikukaigun-g...
September 6, 2025 at 1:20 PM
rikukaigun.org update.
Started to build a library of useful historical sources on the Imperial Japanese military. Plan to add more in the future.
rikukaigun.org/rikukaigun-g...
Started to build a library of useful historical sources on the Imperial Japanese military. Plan to add more in the future.
rikukaigun.org/rikukaigun-g...
rikukaigun.org update.
Added drawings on organization of the infantry company of the IJA type "A" infantry regiment for the Mobilization plan for 1937 (1936): rikukaigun.org/IJA/1936_Typ...
Added drawings on organization of the infantry company of the IJA type "A" infantry regiment for the Mobilization plan for 1937 (1936): rikukaigun.org/IJA/1936_Typ...
September 6, 2025 at 1:09 PM
rikukaigun.org update.
Added drawings on organization of the infantry company of the IJA type "A" infantry regiment for the Mobilization plan for 1937 (1936): rikukaigun.org/IJA/1936_Typ...
Added drawings on organization of the infantry company of the IJA type "A" infantry regiment for the Mobilization plan for 1937 (1936): rikukaigun.org/IJA/1936_Typ...
rikukaigun.org update.
Added Jeff Donahoo's Imperial Japanese Navy Order of Battle (with data on personnel) - December 1, 1941: rikukaigun.org/JeffD/IJN_OO...
Updated data on Kaiten Pilots: rikukaigun.org/JeffD/Kaiten...
Added Jeff Donahoo's Imperial Japanese Navy Order of Battle (with data on personnel) - December 1, 1941: rikukaigun.org/JeffD/IJN_OO...
Updated data on Kaiten Pilots: rikukaigun.org/JeffD/Kaiten...
August 22, 2025 at 6:47 PM
rikukaigun.org update.
Added Jeff Donahoo's Imperial Japanese Navy Order of Battle (with data on personnel) - December 1, 1941: rikukaigun.org/JeffD/IJN_OO...
Updated data on Kaiten Pilots: rikukaigun.org/JeffD/Kaiten...
Added Jeff Donahoo's Imperial Japanese Navy Order of Battle (with data on personnel) - December 1, 1941: rikukaigun.org/JeffD/IJN_OO...
Updated data on Kaiten Pilots: rikukaigun.org/JeffD/Kaiten...
Bought and operated by the Imperial Japanese Army, Parseval PL 13 (Parseval-Luftschiff 13, in Japanese 雄飛, Yuhi) was a non-rigid military single-gondola airship made in 1912 by the Luft-Fahrzeug-Gesellschaft in Bitterfeld (Germany), designed by von Parseval.
August 22, 2025 at 6:28 PM
Bought and operated by the Imperial Japanese Army, Parseval PL 13 (Parseval-Luftschiff 13, in Japanese 雄飛, Yuhi) was a non-rigid military single-gondola airship made in 1912 by the Luft-Fahrzeug-Gesellschaft in Bitterfeld (Germany), designed by von Parseval.
Even if codes are fake (painted for filming) G4M belong to late model G4M1 Model 11, produced between September 1943 and January 1944 (thanks
@jot29qQHPrHE9Gh
for clarification).
So video can be filmed only after September-October 1943 but before 19 July 1944, when Ooi was sunk.
@jot29qQHPrHE9Gh
for clarification).
So video can be filmed only after September-October 1943 but before 19 July 1944, when Ooi was sunk.
August 19, 2025 at 8:54 AM
Even if codes are fake (painted for filming) G4M belong to late model G4M1 Model 11, produced between September 1943 and January 1944 (thanks
@jot29qQHPrHE9Gh
for clarification).
So video can be filmed only after September-October 1943 but before 19 July 1944, when Ooi was sunk.
@jot29qQHPrHE9Gh
for clarification).
So video can be filmed only after September-October 1943 but before 19 July 1944, when Ooi was sunk.
So Ooi should look like this model with _6_ torpedo mounts. BUT on screen we can clearly see _10_ torpedo mounts!
And this video can’t be made before August 1942, because G4M bomber carry “32” code of 732 Air group, created 1 October 1943.
And this video can’t be made before August 1942, because G4M bomber carry “32” code of 732 Air group, created 1 October 1943.
August 19, 2025 at 8:54 AM
So Ooi should look like this model with _6_ torpedo mounts. BUT on screen we can clearly see _10_ torpedo mounts!
And this video can’t be made before August 1942, because G4M bomber carry “32” code of 732 Air group, created 1 October 1943.
And this video can’t be made before August 1942, because G4M bomber carry “32” code of 732 Air group, created 1 October 1943.
Yesterday I’ve posted screens showing rarely seen IJN torpedo cruiser. It’s probably Ooi because all smokestacks are of same length (thank you for clarification, commenters!).
But screens bring new mystery – MYSTERY OF 10 TORPEDO MOUNTS.
Read this threat, to find out what it is>
But screens bring new mystery – MYSTERY OF 10 TORPEDO MOUNTS.
Read this threat, to find out what it is>
August 19, 2025 at 8:53 AM
Yesterday I’ve posted screens showing rarely seen IJN torpedo cruiser. It’s probably Ooi because all smokestacks are of same length (thank you for clarification, commenters!).
But screens bring new mystery – MYSTERY OF 10 TORPEDO MOUNTS.
Read this threat, to find out what it is>
But screens bring new mystery – MYSTERY OF 10 TORPEDO MOUNTS.
Read this threat, to find out what it is>
To add to my previous post - I stand corrected, it's not a pre-war video.
G4M carry unit number "32" = 732th Naval Air Group (Kokutai), which existed between 1 October 1943 and 10 July 1944.
G4M carry unit number "32" = 732th Naval Air Group (Kokutai), which existed between 1 October 1943 and 10 July 1944.
August 18, 2025 at 6:46 PM
To add to my previous post - I stand corrected, it's not a pre-war video.
G4M carry unit number "32" = 732th Naval Air Group (Kokutai), which existed between 1 October 1943 and 10 July 1944.
G4M carry unit number "32" = 732th Naval Air Group (Kokutai), which existed between 1 October 1943 and 10 July 1944.
Screenshots taken from a video of IJN G4M bombers making mock attacks on IJN vessels prewar have yielded photos of either Kitakami or Ooi in their torpedo cruiser form.
Until now there was only one photo showing Kitakami in this form; it was taken by a high-level bomber and is very blurry.
Until now there was only one photo showing Kitakami in this form; it was taken by a high-level bomber and is very blurry.
August 18, 2025 at 6:04 PM
Screenshots taken from a video of IJN G4M bombers making mock attacks on IJN vessels prewar have yielded photos of either Kitakami or Ooi in their torpedo cruiser form.
Until now there was only one photo showing Kitakami in this form; it was taken by a high-level bomber and is very blurry.
Until now there was only one photo showing Kitakami in this form; it was taken by a high-level bomber and is very blurry.
Crew of a IJN Mitsubishi G4M bomber eating before a raid on Port Moresby (New Guinea) - April-May 1942.
August 15, 2025 at 6:58 AM
Crew of a IJN Mitsubishi G4M bomber eating before a raid on Port Moresby (New Guinea) - April-May 1942.
rikukaigun.org update.
Added IJA Air Force aircraft data 1941-45 (strength, losses, distribution, serviceability) based on the several tables from the 1945 IJA report: rikukaigun.org/IJA/IJA%20ai...
Added IJA Air Force aircraft data 1941-45 (strength, losses, distribution, serviceability) based on the several tables from the 1945 IJA report: rikukaigun.org/IJA/IJA%20ai...
August 12, 2025 at 5:13 PM
rikukaigun.org update.
Added IJA Air Force aircraft data 1941-45 (strength, losses, distribution, serviceability) based on the several tables from the 1945 IJA report: rikukaigun.org/IJA/IJA%20ai...
Added IJA Air Force aircraft data 1941-45 (strength, losses, distribution, serviceability) based on the several tables from the 1945 IJA report: rikukaigun.org/IJA/IJA%20ai...
Members of the Imperial Japanese Navy Radio Telegraph Research Committee with one of the first radio telegraph apparatus in Japan (around 1900).
45 years later (in 1944) hand-held radios were already used in combat.
45 years later (in 1944) hand-held radios were already used in combat.
August 12, 2025 at 8:10 AM
Members of the Imperial Japanese Navy Radio Telegraph Research Committee with one of the first radio telegraph apparatus in Japan (around 1900).
45 years later (in 1944) hand-held radios were already used in combat.
45 years later (in 1944) hand-held radios were already used in combat.
New photo of after elevator cover on IJN CV "Kaga" (see photo on the left).
August 6, 2025 at 8:30 AM
New photo of after elevator cover on IJN CV "Kaga" (see photo on the left).