Dai 21 go Kusentei (Japanese submarine chaser, 1941)

Dai 21 go Kusentei 第二十一號驅潜艇

Plan FY1940

Dai 21 go Kusentei 第二十一号駆潜艇 aka Submarine Chaser No.21, or CH-21 was a Japanese warship (Submarine chaser). CH-13 class submarine chasers.

Warships of Japanese Navy (italic incomplete)
Capital Ships	Azuma class (Azuma), Ryujo class (Ryujo), Fuso class (Fuso), Kongo class (Kongo, Hiei), Chinen class (Chinen), Fuji class (Fuji, Yashima), Shikishima class (Shikishima, Hatsuse), Asahi class (Asahi), Mikasa class (Mikasa), Iwami class (Iwami), Sagami class (Sagami, Suwo), Hizen class (Hizen), Tango class (Tango), Iki class (Iki), Mishima class (Mishima, Okinoshima), Tsukuba class (Tsukuba, Ikoma), Kashima class (Kashima, Katori), Satsuma class (Satsuma, Aki), Ibuki class (Ibuki, Kurama), Settsu class (Settsu, Kawachi), Kongo class (Kongo, Hiei, Haruna, Kirishima), Fuso class (Fuso, Yamashiro), Ise class (Ise, Hyuga), Nagato class (Nagato, Mutsu), Kaga class (Kaga, Tosa), Amagi class (Amagi, Akagi, Takao, Atago), Kii class (Kii, Owari, No11, No12), No 13 class (No13, No14, No15, No16), Yamato class (Yamato, Musashi, Shinano, No110), B64 type
Aircraft Carriers	Hosho class (Hosho), Shokaku class (Shokaku), Akagi class (Akagi), Kaga class (Kaga), Ryujo class (Ryujo), Soryu class (Soryu), Hiryu class (Hiryu), Shokaku class (Shokaku, Zuikaku), Zuiho class (Zuiho, Shoho), Ryuho class (Ryuho), Junyo class (Junyo, Hiyo), Taiho class (Taiho), Chitose class (Chitose, Chiyoda), Shinano class (Shinano), Unryu class (Unryu, Amagi, Katsuragi, Kasagi, Ikoma, Aso), Ibuki class (Ibuki), Taiyo class (Taiyo, Unyo, Chuyo), Kaiyo class (Kaiyo), Shinyo class (Shinyo)
Cruisers	Naniwa class (Naniwa, Takachiho), Unebi class (Unebi), Matsushima class (Matsushima, Itsukushima, Hashidate), Akitsushima class (Akitsushima), Yoshino class (Yoshino), Izumi class (Izumi), Saien class (Saien), Chiyoda class (Chiyoda), Suma class (Suma, Akashi), Takasago class (Takasago), Kasagi class (Kasagi, Chitose), Asama class (Asama, Tokiwa), Yakumo class (Yakumo), Azuma class (Azuma), Izumo class (Izumo, Iwate), Tsushima class (Tsushima, Niitaka), Kasuga class (Kasuga, Nisshin), Otowa class (Otowa), Aso class (Aso), Soya class (Soya), Tsugaru class (Tsugaru), Suzuya class (Suzuya), Tone class (Tone), Yodo class (Yodo, Mogami), Chikuma class (Chikuma, Hirato, Yahagi), Tenryu class (Tenryu, Tatsuta), Kuma class (Kuma, Tama, Kiso, Oi, Kitakami), Nagara class (Nagara, Isuzu, Yura, Natori, Kinu, Abukuma), Sendai class (Sendai, Jintsu, Naka, Kako), Yubari class (Yubari), Furutaka class (Furutaka, Kako), Aoba class (Aoba, Kinugasa), Myoko class (Myoko, Nachi, Haguro, Ashigara), Takao class (Takao, Atago, Chokai, Maya), Mogami class (Mogami, Mikuma, Suzuya, Kumano), Tone class (Tone, Chikuma), Katori class (Katori, Kashima, Kashii, Kashihara), Agano class (Agano, Noshiro, Yahagi, Sakawa), Ioshima class (Ioshima, Yasoshima), Oyodo class (Oyodo, Niyodo), Ibuki class (Ibuki, No301)
Gunboats or Corvettes	Kanrin-maru class (Kanrin-Maru, Choyo-Maru), Kanko-maru class (Kanko-Maru), Tsukuba class (Tsukuba), Raiden class (Raiden), Yoshun class (Yoshun), Kasuga class (Kasuga), Fujiyama class (Fujiyama), Chiyodagata class (Chiyodagata), Teibo class (Dai 1 Teibo, Dai 2 Teibo), Moshun class (Moshun), Unyo class (Unyo), Hosho class (Hosho), Nisshin class (Nisshin), Asama class (Asama), Kenko class (Kenko), Seiki class (Seiki), Jingei class (Jingei), Amagi class (Amagi), Banjo class (Banjo), Tsukushi class (Tsukushi), Kaimon class (Kaimon), Tenryu class (Tenryu), Katsuragi class (Katsuragi, Yamato, Musashi), Maya class (Maya, Chokai, Atago, Akagi), Takao class (Takao), Yaeyama class (Yaeyama), Chishima class (Chishima), Oshima class (Oshima), Tatsuta class (Tatsuta), Heien class (Heien), Soko class (Soko), Chinto class (Chinto, Chinzei, Chinnan, Chinhoku, Chinchu, Chinpen), Biun class (Biun), Kohei class (Kohei), Miyako class (Miyako), Chihaya class (Chihaya), Uji class (Uji), Sumida class (Sumida), Manshu class (Manshu), Anegawa class (Anegawa), Fushimi class (Fushimi), Toba class (Toba), Saga class (Saga), Ataka class (Ataka), Seta class (Seta, Katata, Hira, Hozu), Atami class (Atami, Futami), Hashidate class (Hashidate, Uji), Fushimi class (Fushimi, Sumida), Tatara class (Tatara), Suma class (Suma), Karatsu class (Karatsu), Maiko class (Maiko), Narumi class (Narumi), Okitsu class (Okitsu)
Seaplane Tender	Wakamiya class (Wakamiya), Notoro class (Notoro), Kamoi class (Kamoi), Chitose class (Chitose, Chiyoda), Mizuho class (Mizuho), Nisshin class (Nisshin), Akitsushima class (Akitsushima)
Submarine Depot Ship	Toyohashi class (Toyohashi), Karasaki class (Karasaki), Komahashi class (Komahashi), Jingei class (Jingei, Chogei), Taigei class (Taigei), Tsurugizaki class (Tsurugizaki, Takasaki)
Minelayer	Tsugaru class (Tsugaru), Aso class (Aso), Katsuriki class (Katsuriki), Tokiwa class (Tokiwa), Itsukushima class (Itsukushima), Shirataka class (Shirataka), Yaeyama class (Yaeyama), Okinoshima class (Okinoshima), Hatsutaka class (Hatsutaka, Aotaka, Wakataka, Asadaori), Tsugaru class (Tsugaru), Minoo class (Minoo)
Destroyers	1st class	Umikaze class, Urakaze class, Isokaze class, Tanikaze class, Minekaze class, Kamikaze class, Mutsuki class, Fubuki class, Akatsuki class, Hatsuharu class, Shiratsuyu class, Asashio class, Kagero class, Yugumo class, Shimakaze class, Akizuki class, Matsu class, Tachibana class
	2nd class	Sakura class, Kaba class, Momo class, Enoki class, Momi class, Wakatake class
	3rd class	Ikazuchi class, Murakumo class, Akatsuki class, Shirakumo class, Harusame class, Fumizuki class, Satsuki class, Makigumo class, Asakaze class
	Torpedo Boats	Chidori class, Otori class
Submarines	1st class	KD1 type, KD2 type, J1 type, KD3a type, ML type, KD3b type, KD4 type, KD5 type, J1M type, KD6a type, J2 type, J3 type, KD6b type, C1 type, A1 type, B1 type, KD7 type, B2 type, C3 type, A2 type, AM type, B3 type, B4 type, C2 type, C4 type, D1 type, D2 type, SA type, SH type, ST type, I-501 class, I-503 class, I-504 class, I-505 class, I-506 class
	2nd class	KC1 type, F1 type, L1 type, KC2 type, L2 type, KC3 type, F2 type, L3 type, KC4 type, L4 type, KCS type, KC5 type, KS type, KC6 type, Ro-500 class, SYS type, Ro-501 class, STS type
	3rd class	Holland type, Holland-Navy type, C1 type, C2 type, Vickers-Kawasaki type, S1 type, C3 type, S2 type
Escort Vessels	Escorts	Shimushu class, Etorofu class, Mikura class, Ukuru class, C type, D type, CDa-A type, CDa-B type
	Patrol Craft	PB-1 class, PB-31 class, PB-46 class, PB-101 class, PB-102 class, PB-103 class, PB-104 class, PB-105 class, PB-106 class, PB-107 class, PB-108 class, PB-109 class, PBa-1 class
	Minesweepers	W-1 class, W-5 class, W-13 class, W-17 class, W-7 class, W-19 class, W-101 class, Wa-1 class, Wa-101 class, Wa-104 class
	Submarine Chasers	CH-1 class, CH-3 class, CH-4 class, CH-13 class, CH-28 class, CHa-251 class, CHa-101 class, CHa-102 class, CHa-103 class, CHa-111 class, CHa-112 class, CHa-117 class, CHa-1 class
	Minelayer Craft	Tsubame class, Natsushima class, Sarushima class, Sokuten class, Ajiro class, Kamishima class, Sokuten class, Ma-1 class, Ma-101 class
Auxiliaries	Trainers	Settsu class, Chobin class, Ishikawa class, Tateyama class, Kanju class
	Repair Ships	Asahi class, Kanto class, Akashi class
	Transports	Matsue class, Takasaki class, Rozan class, Seito class, Koshu class, Shijiki class, Tsurugizaki class, Sunosaki class, Muroto class, Noma class, Shiretoko class, Ondo class, Kamoi class, Mamiya class, Soya class, Kashino class, Nozaki class, Kinesaki class, Irako class, Ashizuri class, Sunosaki class, Oze class, Kazahaya class, Hayasui class, Hario class, Kurasaki class, Tamano class
	Icebreakers	Odomari class
	Survey Ships	Yamato class, Tsukushi class
	Target Ships	Settsu class, Yakaze class, Hakachi class, Ohama class
	Cablelayers	Hashima class
	Landing Ships	T-1 class, T-101 class, T-103 class
FAC	Torpedo Boats	TB-1 class, Kotaka class, TB-5 class, TB-21 class, TB-22 class, TB-26 class, TB-27 class, TB-28 class, Fukuryu class, Hayabusa class, Shirataka class, TB-29 class, TB-39 class, TB-50 class, TB-67 class
	MTB and MGB	MTB-10 class, MTB-11 class, MTB-1 class, MTB-151 class, MTB-201 class, MTB-206 class, MTB-220 class, MTB-235 class, MTB-241 class, MTB-301 class, MTB-327 class, MTB-411 class, MTB-468 class, MTB-469 class, MTB-474 class, MTB-491 class, MTB-538 class, MTB-H1 class, MTB-H2 class, MTB-H10 class, MTB-H27 class, MTB-H74 class, MTB-H101 class, MTB-101 class, MTB-102 class, MTB-113 class, MTB-114 class
Armed Merchantmen	Cruiser, Minelayer, Netlayer, Aircraft carrier, Seaplane tender, Aircraft transport, Torpedo boat tender, Submarine depot ship, Minesweeper tender, Gunboat, Landing ship, Netlayer craft, Anti submarine netlayer craft, Minelayer craft, Submarine chaser, Minesweeper, Picket boat, Transport ship, Transport, Repair ship, Harbor support ship, Survey ship, Icebreaker, Cablelayer, Hospital ship, Rescue ship, Utility ship

Escort Vessels of Japanese Navy (italic incomplete)
Escorts	Shimushu class (Shimushu, Hachijo, Kunashiri, Ishigaki), Etorofu class (Etorofu, Oki, Sado, Matsuwa, Fukae, Tsushima, Mutsure, Wakamiya, Kanju, Hirato, Amakusa, Manju, Kasado, Iki), Mikura class (Mikura, Miyake, Awaji, Kurahashi, Nomi, Chiburi, Yashiro, Kusagaki), Ukuru class (Ukuru, Hiburi, Shonan, Daito, Okinawa, Kume, Ikuna, Shinnan, Yaku, Aguni, Mokuto, Inagi, Uku, Chikubu, Habushi, Sakito, Kuga, Ojika, Kozu, Kanawa, Shiga, Amami, Hotaka, Habuto, Io, Takane, Ikara, Shisaka, Ikino, Otsu, Urumi, Murotsu, Tomoshiri), C type (CD-1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181, 183, 185, 187, 189, 191, 193, 195, 197, 199, 201, 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, 233, 235, 237, 239, 241, 243, 245, 247, 249, 251, 253, 255, 257, 259, 261, 263), D type (CD-2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, 242, 244, 246, 248, 250, 252, 254, 256, 258, 260, 262, 264, 266, 268, 270, 272, 274, 276, 278, 280, 282, 284, 286), CDa-A type (CDa-1, 2), CDa-B type (CDa-101, 103, 104, 109, 113, 118, 119, 122, 125, 126, 128, 131, 132, 133, 137, 138, 139, 141, 144, 148, 151, 157)
Patrol Craft	PB-1 class (PB-1, 2), PB-31 class (PB-31, 32, 33, 34, 35, 36, 37, 38, 39), PB-46 class (PB-46), PB-101 class (PB-101), PB-102 class (PB-102), PB-103 class (PB-103), PB-104 class (PB-104), PB-105 class (PB-105), PB-106 class (PB-106), PB-107 class (PB-107), PB-108 class (PB-108), PB-109 class (PB-109), PBa-1 class (PBa-1, 2, 3, 4, 25, 26, 27, 31, 32, 33, 34, 37, 38, 54, 55, 64, 65, 84, 85, 86, 90, 91, 92, 93, 110, 111, 122, 123, 134, 135, 136, 137, 138, 139, 140, 152, 153, 154, 155, 156, 163, 164, 165, 166, 173, 174, 175, 176, 177, 178, 179, 180, 181, 191, 192, 193)
Minesweepers	W-1 class (W-1, 2, 3, 4), W-5 class (W-5, 6), W-13 class (W-13, 14, 15, 16), W-17 class (W-17, 18), W-7 class (W-7, 8, 9, 10, 11, 12), W-19 class (W-19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88), W-101 class (W-101, 102), Wa-1 class (Wa-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22), Wa-101 class (Wa-101, 102, 103, 105), Wa-104 class (Wa-104, 106, 107)
Submarine Chasers	CH-1 class (CH-1, 2), CH-3 class (CH-3), CH-4 class (CH-4, 5, 6, 7, 8, 9, 10, 11, 12), CH-13 class (CH-13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27), CH-28 class (CH-28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89), CHa-251 class (CHa-251, 252, 253), CHa-101 class (CHa-101), CHa-102 class (CHa-102, 104, 109, 110, 118), CHa-103 class (CHa-103, 105, 106, 107, 108, 114, 115), CHa-111 class (CHa-111), CHa-112 class (CHa-112, 113, 116), CHa-117 class (CHa-117), CHa-1 class (CHa-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250)
Minelayer Craft	Tsubame class (Tsubame, Kamome), Natsushima class (Natsushima, Nasami), Sarushima class (Sarushima), Sokuten class (Sokuten, Shirakami, Naryu, Kyosai, Ukishima, Hirashima, Hoko, Ishizaki, Takashima, Saishu, Niizaki, Yurijima, Nuwajima, Maejima, Moroshima), Ajiro class (Ajiro), Kamishima class (Kamishima, Awashima), Sokuten class (Natsushima, Sokuten, Toshima, Kuroshima, Ashizaki, Katoku, Ento, Kurokami, Katashima, Enoshima, Ninoshima, Kurosaki, Washizaki), Ma-1 class (Ma-1, 2, 3, 4), Ma-101 class (Ma-101)