I’m a little late to the party here but I wanted to pass on some information about the 4 IJN shipyard gray colors. The Mr. Color paint line from Mr Hobby has all four individual greys.
C601 Kure
C602 Sasebo
C603 Maizuru
C32 Dark Grey (2) sub color name is Yokosuka.
C604 IJN type 21 Camo
C605 IJn type 22 Camo
C606 IJN Linoleum Deck
I hope this helps.
