Thank you for your replies so far.
I currently own "Gia No Monsho" along with a number of other NCS titles. I have listed below by volume number and NCS catalogue code the titles that I am aware of:
Masaya 1
Masaya 2 Moto Roader NCS89002
Masaya 3 Ganbare! Golf Boys NCS89003
Masaya 4 Shubibinman NCS89004
Masaya 5 Energy NCS89005
Masaya 6 Double Dungeons NCS89006
Masaya 7 Gai Flame NCS90001
Masaya 8 Hisou Kihei Serd NCS90002
Masaya 9 Nazo No Mascarade NCS90003
Masaya 10 Kickball NCS90004
Masaya 11 Wallaby NCS90005
Masaya 12 Shubibinman 2 NCS91001
Masaya 13 Moto Roader 2 NCS91002
Masaya 14 Dragon Egg NCS91003
Looking at the catalogue codes I would expect that NCS Vol 1. would have a code of NCS89001.
However I have always presumed that "Gia No Monsho" is Vol. 1 due to the fact that I have been unable to locate an NCS title with "Vol 1" printed on the game, I cannot locate details of NCS89001 and that it has the earliest catalogue code of NCS63001
Comments and thoughts please