On 8 December 1941, she was assigned to Operation "G", the
invasion of Guam as one of 10 transports carrying Major General
Horii Tomitaro's 55th Infantry Corps. The naval operation was headed by the
4th Fleet operating out of
Saipan consisting of minelayer
Tsugaru as flagship; seaplane tender
Kiyokawa Maru; 4 cruisers,
Aoba,
Furutaka,
Kako,
Kinugasa (Cruiser Division 6, detached from
1st Fleet); and 4 destroyers,
Oboro (detached from Carrier Division 5 of the
IJN 1st Air Fleet), and
Kikuzuki,
Uzuki, and
Yūzuki (Destroyer Division 23, detached from Carrier Division 2,
IJN 1st Air Fleet). The remaining ships all belonged to the Fifth Base Force,
4th Fleet consisting of Gunboat Division 7 (
Hirotama Maru,
Shotoku Maru), Subchaser Division 59 (subchasers
Shonan Maru No. 5,
Shonan Maru No. 6; netlayer
Shofuku Maru), Subchaser Division 60 (subchasers
Kyo Maru No. 8,
Kyo Maru No. 10; netlayer
Shuko Maru), and Minesweeper Division 15 (
Fumi Maru No. 2,
Seki Maru No. 3). ==Invasion of Salamaua–Lae==