The main problems I see are the cloudy (?) water and the recently planted foreground. The foreground needs time to fill in. The street of Hygrophila difformis on the right hand side could be grown into a more solid line. These will greatly enhance the appearance and presentation of this aquascape.
the tank is 6ftx2ftx2ft = 640L. Lighting amount is 9x36W and 1x40W = 364W. Yes. That is japonica. They growing very healthy.
the tank running with a taiwan made 1200l/h canister, the filteration is not as good as eheim. That's why the water still cloudy. Planning to get a eheim to run on it.
Some plants in foreground growing quite slow. due to cant really get the lighting. (i m quite a lazy fella. seldom trim the plants)
emmm...was wanna change the background to blue. But end up can't get it in that moment. so...just used the black. Anyway, black look cool and working fine.
This planted tank is indeed awesome, I bet the fish feel like they're in fish-heaven. The jungle layout is working out great, and healty! You have really good growth, especially with the likes of the Tonina.
Some suggestions: more filtiration(1200l/h is nothing), get another canister to increase visibilty. Trim the hygro that is reach for the surface, try making it even with the driftwood. Try growing the vals in uniform(it kindof looks meesy with each leaf going it's own way). Get more Altums, yours looks really lonely!