1/144 IJA O-I 100 Ton Tank - Matuo Kasten
The O-I was a planned 100 - 130t tank with a range of speculated armaments planned for the IJA, like many "mega tanks" it did not progress as its practically was doubtful. Sources agree on a main 105mm gun and then vary for 47mm & 37mm secondary armaments and various tertiary 7mm weapons.
Matuo Kasten looks to be planning to produce this in 1/144 (see here )
source: Matuo Kasten , Military Factory, Provehicle, Greyfalcon, WW2 Drawings