Brother no such thing as silly question. I am watch silly also.
As far as I know when I was in Japan recently Monster is not display at the counter so I think its not a JDM. To further prove that if you check the Seiko Japan website for the model its not there also which only shows the JDM. In addition when I was in Japan I ask them where I can get SRP309J the retail assistant said this is in International Market model not avavilable here.
I have seen a few limited edition Monster mostly in the Thailand market. I think you may get some Blue, Yellow Monster and all kinds of monsters in Thailand if your are lucky.
I saw one orange monster with complete PVD black which is also a LE but all sold out.
My monster in the pic
Hmm, I think all the monster you mentioned above are 1st generation monster, where they have square minute markers, grooved crown, 7S26 movement, aka SKX series.
The PVD orange monster (also 1st Gen.) is a JDM version, coded SZEN001, if I got my info right.
Your Orange Monster shown in the picture is a 2nd Gen., aka new monster, some people call them shark teeth, or sharp teeth, even sarlacc (star war references). It has a better 4R36 movement which hack and hand-windable, a cleaner dial with 5 minutes marker removed and a knurled crown. Also not to forget the shark-tooth like minute markers.
