Kato did the C62 4-6-4 in 1:160 instead of 1:160. I don’t know what the retooled D51 and other recent JNR Kato steam that followed it were proportioned at. 1:150 is closer to accurate for the Japanese track gauge. Micro-Ace, Tomix, and Kawai are 1:150 for steam, diesel and electric. Bullet trains running on 4’-8 1/2” track are 1:160.
Charlie Vlk