About a more accurate analisys see:
http://www.ibiblio.org/hyperwar/USN/Aleutians/USN-CN-Aleutians-Intro.html
Japanese invasion forces, from Hokkaido island :
NORTHERN (Aleutians) FORCE (5th Fleet) - VADM Hosogaya Moshiro
Chief of Staff, CAPT Nakazawa Tasuku
Northern Force Main Body - VADM Hosogaya
Nachi (CA, flagship) - CAPT Kiyota Takahiko
Screen - CDR Takeuchi Hajime
Inazuma (DD) - CDR Takeuchi
Ikazuchi (DD) - LCDR Kudo Shunsaku
Supply Group
Fuhisan Maru (oiler)
Nissan Maru (oiler)
3 cargo ships
Second Carrier Striking Force - RADM Kakuta Kakuji
Carrier Group (CarDiv 4) - RADM Kakuta
Ryujo (CVL, flagship) - CAPT Kato Tadao
Air Unit - LT Yamagami Masayuki
Kansen - LT Kobayashi Minoru 16 A6M2
Kanko - LT Yamagami 21 B5N2
Junyo (CV) - CAPT Ishii Shizue
Air Unit - LT Shiga Yoshio
Kansen - LT Shiga 24 A6M2
Kanbaku - LT Abe Zenji 21 D3A1
Support Group (2nd section, CruDiv 4) - CAPT Nabeshima Shunaska
Maya (CA) - CAPT Nabeshima
Takao (CA) - CAPT Asakura Bunji
Screen (DesDiv 7) - CAPT Konishi Kaname
Akebono - LCDR Nakagawa Minoru
Ushio - CDR Uesugi Yoshitake
Sazanami - LCDR Uwai Hiroshi
Teiyo Maru (oiler)
Attu Invasion Force - RADM Omori Sentaro
Abukuma (CL, flagship)
DesDiv 21 - CAPT Shimizu Toshio
Wakaba - LCDR Kuroki Masakichi
Nehohi - LCDR Terauchi Saburo
Hatsuharu - CDR Makino Hiroshi
Hatsushimo - LCDR Migihama Satoru
Magane Maru (minesweeper)
Kinugasa Maru (transport)5
Kiska Invasion Force - CAPT Ono Takeji
CruDiv 21 - CAPT Ono
Kiso (CL, flagship) - CAPT Ono
Tama (CL) - CAPT Kawabata Masaharu
Asaka Maru (auxiliary cruiser) - CAPT Ban Jiro
Screen (DesDiv 6) - CAPT Yamada Yusuke
Hibiki - LCDR Ishii Hagumu
Akatsuki - CDR Takasuka Osamu
Hokaze - LCDR Tanaka Tomoo
Transports6
Hakuho Maru
Kumagawa Maru
Minesweeper Div 13 - CAPT Mitsuka Toshio
Hakuho Maru
Shunkotsu Maru
Kaiho Maru
Submarine Detachment - RADM Yamazaki Shigeshi
SubRon 1 - I.9 (flagship) - RADM Yamazaki
SubDiv 2 - CAPT Imazato Hiroshi
I.15 - CDR Ishikawa Nohuo
I.17 - CDR Nishino Kozo
I.19 - Narahara Seigo
SubDiv 4 - CAPT Nagai Mitsuru
I.25 - CDR Togami Meihi
I.26 - CDR Yokota Minoru
from:
http://www.centuryinter.net/midway/appendix/appendixtwo.html
Details about the air actions in June 3-4( from Eserciti nella Storia, Deltaedeitrice editions, n. 11, May 2002):
-First attack by 15 Mitsubishi A6M2 of 6th Kokutai , from carrier Junyo , each with two 60 kg bombs, and 13 Nakajima B5N Kate each with a 500 Kg high explosive bomb , from carrier Ryujo.
12 Aichi D3a val from Junyo didn't succeed in finding their target and came back.
Japanese task force was spotted by a Catalina that was immediately shot down by a Zero, and by floatplane-carrier USS Gillis which launched the alarm , received only by Cold Bay airport, too far ( 300 km) for an effective action of the P40s.
-June, 4: 10 Zeros , 16 Val and various floatplanes attacked again Dutch Harbour ,causing serious damages and some casualties.
A counter-attack by 21 P40 from Fort Glenn US Army secret airport in Unmak island caused the lost of two mitsubishi F1m Pete and 1 Aichi E13a Jake while they were attacking four destroyers in the harbour.
One Zero ( Pilot Officer Tadayoshi Koga), damaged by the AA fire ,did an emergency landing in Akutan island , where it was captured , repaired and sent to San Diego: it gave precious informations about the new fighter to US armed forces.
In the morning 6 B26 each armed by a torpedo from Fort Glenn attacked the japanese fleet , only one targeted Ryujo but the torpedo missed the carrier, one Marauder was shot down by the Zeros, the others could neither find their targets and they came back to their airport.
Two B17 attacked heavy cruiser Takao without any apparent results, one of them was shot down by the AA fire.
The attack caused 43 casualties ( ten civilians) and 64 injured in two days.
USA lost 11 aircrafts , most of them Catalina flying boats intercepted by the Zeros in the hours before the second attack, Japaneses lost ten aircrafts.