Naryuga, the map is nice for me and it's close to get ranked I think.
[Normal]
00:02:393 , 00:03:504 , 00:04:060 , 00:04:615 and 00:05:726 - I would add circles there.
00:15:448 , 00:16:560 and 00:17:671 - ^
01:46:004 (1,2) - I would change this part to this:
01:50:310 (3) - Try to use this pattern here:
02:27:115 (3) - I would use here 2 reverse instead of 1 and short a slider to 1/1 beat.
[Hard]
02:03:226 (4,5,1,2,3,4,5) - Try this pattern, I think it's better here:
03:10:448 (1,2,3,4,5,6,7) - ^ (almost the same - remove doubles and make them on white ticks)
[Insane]
00:29:337 (1,2,3) - It's a little confusing, I suggest to move third one to another place to easier read the map.
02:13:782 (1,2,3,4,1,2,3,4) - Confusing part again, try to Ctrl+G both 2nd/3rd circles.
03:29:337 (1,2,3) - Same as first line i wrote in Insane, confusing.
[Futsuu]
Good for me, maybe a little to hard, but... nice.
[Muzukashii]
A little to easy for Muzukashii. You can try to use triplets instead of slow doubles eg. "ddk" when it's "d k" pattern to make it a little harder.
[Oni]
Nice diff, but I think it's a little to easy for Oni, try to make a longer streams, not only 3- or 5-notes "streams".
[Inner Oni]
I have nothing to say with this, pretty nice. ;D
That's all from me. It stays for 2 years in pending, but I hope it gets ranked soon.
Good luck~