The design was not realistic. Lacking the necessary technical knowledge and facilities and finances it would have been impossible to built such a large ship at the time. The opinion differs when he made this design, some dates it around 1912 others between 1922-1923. Hidetaro Kaneda (28 January 1873-11 June 1925), retired on 25 February 1925 with the rank of vice admiral, was director of the Kure Naval Yard, Japan in the period 1 December 1922-13 August 1923. Between 1905-1908 he was living in the United Kingdom. Displacement 500.000 tons with as dimensions 609 x 91 x 18 metres. One theory even claimes a s dimensions of 1.017 x 150 metres and a displacement of 1.000.000 tons. An armament of 50x2-40.6 cm guns, 200x1-14cm/5.5” guns mounted in casemates along the hull, 10x1-10cm/3.9” anti aircraft guns in casemates and 100-62cm/24.4” torpedo tubes. Speed 42 knots. Crew would number 12.000 men.
In the USA asked senator Benjamin Ryan Tillman (11 August 1847-3 July 1918) in 1912 the US Navy what the maximum size of a battleship was what could be build. Within a period of 4 years they came up with some designs known as the Tillmann or Maximum battleship the largest ever to be built. The Tillman IV-2 design (72.600 tons, 297 metres length, 25.2 knots, 5x3-45.7cm/18” guns) came as far as the Congress. None was however realized while the USA entered the First World War and after the war the Washington Navy Treaty of 1922 made it impossible to realize such projects. The treaty was a result of the Washington Naval Conferene between November 1921-February 1922 and Japan was one of the naval powers who signed this treaty which limited the number of battleships, their size (maximum 35.000 tons) and maximum calibre of the main guns (40.6cm/16”).
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