"Su-Ki"
From IH8MUD Wiki
Amphibious Truck "Su-Ki"
Production starts : November 1943 Weight : 6.4 ton Dimensions: 7.6 x 2.2 x 2.4(h) m Speed (max) : 65 km/hr Engine : Gasoline Engine 65 HP Production Qty : 198 Manufacturer : Toyota Motor Co., Ltd.
Su-Ki is the amphibious truck developed by IJA. It is based on Toyota 4x4 Truck "To-Ki". Su-Ki was deployed in the forces on the Pacific islands.
Photographs can be seen here: http://forum.ih8mud.com/chit-chat-section/182354-amphibious-toyota-wwii.html
From the "Su-Ki", the imperial japanese army (IJA) experimental "Toyota LVT" from WWII was produced.