Allen posted a picture to Twitter showing World War II ship's rusting bow

Musashi, the Japanese Navy's biggest battleship, was sunk in 1944

It lay undiscovered on the floor of the Sibuyan Sea for the past 70 years

Billionaire Allen has now used his personal submarine to find the ship

Discovery brings to an end Allen's eight year search for the Musashi

Microsoft's co-founder has used his own submarine to find the wreck of the Japanese Navy's biggest warship - which has lain undiscovered at the bottom of the ocean for the past 70 years.

Paul Allen revealed his amazing discovery to the world on Tuesday, by posting a photo to Twitter of the World War II battleship Musashi's rusty bow, which bore the Japanese empire's Chrysanthemum seal.