I would be doubtful of the orange tails until you could show some better photo evidence. AND prove they were combat schemes. I don't see it too well in the photo you showed.
It's one thing to hunt down the brightest most colorful schemes, but IMO they're misleading because 99.9999% of the time they never flew combat or were specialized training schemes or what-have-you. The reason you don't fly bright planes into combat is they get picked on first and get shot down first. Camouflage was to blend in, not to stand out.
Close up of the second partial photo that I had previously posted of that unit's tail markings.
Clear demarcation line on two aircraft where vertical stabilizer starts. A single horizontal stripe with numbers above it. As far as colours are concerned in most cases when no colour photos exist profiles & documented known squadron markings are typically the bench mark.
I don't know a lot about this unit so far except what the plastic model has about it. Phillippines in 1944
A little far from home to be a trainer unit I think?
As far as the camo is for hiding type comment
Yeah I would tend to agree with that except there are always exceptions,squadron leader markings,lead aircraft formation leaders. The Japanese where not afraid to use some colour when needed. As for example lets look at this D3A at Pearl Harbour.
Safe bet this guy stood out like a soar thumb on the first day of WWII against the USA.
Try a new approach.
Lets look at the Naval air group 381ST.
http://niehorster.orbat.com/014_japan/navy-co/air-groups.htmlLeader of this group from above link.
381 Naval Air Group
activated 10.43
disbanded 9.45
• Capt Kondo Katsuji (46) 10.43 – 10.44
Capt Katsuji some info on him.
http://pwencycl.kgbudge.com/K/o/Kondo_Katsuji.htmhttp://homepage2.nifty.com/nishidah/e/px46.htm#r015A very distinguished career to say the least & CO of a fighter group.
381ST had carrier fighters & night fighters so I would say no trainer unit here.
http://pwencycl.kgbudge.com/oob/jap.php?unit=381_Air_Group#381_Air_GroupI will dig around some more on this.