2nd Naval Armaments Supplement Programme: Difference between revisions

Revision as of 22:52, 1 February 2020

Latest revision as of 18:08, 23 September 2024

(4 intermediate revisions by 4 users not shown)

Line 1:

{{Short description|Second of four Imperial Japanese Naval Expansion plans}}

[[File:Japanese heavy cruiser Chikuma.jpg|thumb|right|250px|Construction of the cruiser {{ship|Japanese cruiser|Tone|1937|2}} was authorized under the "Circle-2 Plan"]]

Line 6 ⟶ 7:

The [[London Naval Treaty]] placed severe restrictions on Japan's naval capabilities vis-a-vis the [[United States Navy]] and the British [[Royal Navy]] in terms of tonnage and numbers of [[capital ship|capital warships]]. The response of the [[Imperial Japanese Navy General Staff]] was to initiate a construction program to build new warships to the allotted tonnage limits in each of the restricted categories, and to invest in types of warships and weaponry not specifically covered by the provisions of the treaty.<ref>Evans, ''Kaigun''. pp. 238–239</ref>

The "Circle One" plan was submitted by the [[Ministry of the Navy of Japan|Naval Ministry]] and approved by the [[Cabinet of Japan|Cabinet]] in November 1930, and officially ratified by the [[Diet of Japan]] in 1931. It called for the construction of 39 new combat vessels, centering on four of the new {{sclass-Sclass|Mogami|cruiser}}s, and expansion of the [[Imperial Japanese Navy Air Service]] to 14 Naval Air Groups. However, plans for a second expansion budget were delayed by the [[Tomozuru Incident|''Tomozuru'' Incident]] and [[IJN 4th Fleet Incident]], when it was revealed that the basic designs of many Japanese warships were flawed due to poor construction techniques and instability caused by attempting to mount too much weaponry on too small a displacement hull. As a result, most of the naval budget in 1932–1933 was absorbed in modifications to rectify issues with existing equipment.

In 1934, the Naval Ministry submitted its second expansion plan to the Cabinet and Diet for approval. This plan was a multiyear (four year) budget, covering the construction of 48 new warships and creation of eight new Naval Air Groups. A total of 431,680,800 [[Yen]] was allotted for warship construction and 33,000,000 Yen for [[naval aviation]].

Line 12 ⟶ 13:

==Table of vessels==

{| class="wikitable" width="90%"

|! width="8%" | '''Category'''

|! width="10%" | '''Class'''

|! width="2%" | '''Planned'''

|! width="15%" | '''Completed'''

|! width="10%" | '''Converted'''

| !width="6%" | '''Cancelled'''

|-

| Heavy cruiser

| {{sclass-Sclass|Tone|cruiser|5}}

| 2

| {{ship|Japanese cruiser|Tone|1937|2}}, {{ship|Japanese cruiser|Chikuma|1938|2}}

Line 30 ⟶ 31:

| 1

| {{ship|Japanese aircraft carrier|Sōryū||2}}

| 1One planned vessel was converted to the ''Hiryū'' classinstead.

|

|-

Line 40 ⟶ 41:

|-

| rowspan="2"|Destroyer

| {{sclass-Sclass|Shiratsuyu|destroyer|5}}

| 4

| {{Ship|Japanese destroyer|Umikaze|1936|2}}, {{ship|Japanese destroyer|Yamakaze|1936|2}}, {{ship|Japanese destroyer|Kawakaze|1936|2}}, {{ship|Japanese destroyer|Suzukaze||2}}

Line 46 ⟶ 47:

|

|-

| {{sclass-Sclass|Asashio|destroyer|5}}

| 10

| ''[[Japanese destroyer Asashio (1936)|Asashio]]'', ''[[Japanese destroyer Ōshio|Ōshio]]'', ''[[Japanese destroyer Michishio|Michishio]]'', ''[[Japanese destroyer Arashio|Arashio]]'', ''[[Japanese destroyer Yamagumo (1937)|Yamagumo]]'', ''[[Japanese destroyer Natsugumo (1937)|Natsugumo]]'', ''[[Japanese destroyer Asagumo (1938)|Asagumo]]'', ''[[Japanese destroyer Minegumo (1937)|Minegumo]]'', ''[[Japanese destroyer Arare (1937)|Arare]]'', ''[[Japanese destroyer Kasumi (1937)|Kasumi]]''

Line 53 ⟶ 54:

|-

| Torpedo boat

| {{sclass-Sclass|Ōtori|torpedo boat|5}}

| 16

| ''[[Japanese torpedo boat Ōtori (1935)|Ōtori]]'', ''[[Japanese torpedo boat Hiyodori|Hiyodori]]'', ''[[Japanese torpedo boat Hayabusa (1935)|Hayabusa]]'', ''[[Japanese torpedo boat Kasasagi (1935)|Kasasagi]]'', ''[[Japanese torpedo boat Kiji (1937)|Kiji]]'', ''[[Japanese torpedo boat Kari (1937)|Kari]]'', ''[[Japanese torpedo boat Sagi (1937)|Sagi]]'', ''[[Japanese torpedo boat Hato (1937)|Hato]]''

Line 112 ⟶ 113:

| 2

| ''[[Japanese aircraft carrier Shōhō|Tsurugizaki]]'', ''[[Japanese aircraft carrier Zuihō|Takasaki]]''

| Both ''Tsurugizaki'' and ''Takasaki'' were converted into {{sclass[[Zuihō-|Shōhō|class aircraft carrier|1}}sShōhō-class aircraft carriers]] prior to the war, in which both were lost during the war.

|

|-