Muzukashii mod here[OniJAM's Oni]
00:11:388 (29,30,31) - This does not call for a 1/4 at all.
00:31:388 (112,113,114,115,116,117,118,119,120,121,122,123,124,125,126) - The way you put this long stream is completely random, the song absolutely does not call for this. Calm down the pattern to 1/2s and 1/4s when necessary.
01:30:055 (436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452) - ^
01:40:722 (515,516,517,518,519,520,521,522,523,524,525,526,527,528,529,530,531) - ^
00:16:888 (45,46,47,48,49,50,51,52,53,54,55,56,57,58) - Instead of mapping the instrument, and then vocals (as it makes the whole sound/play very awkward) why not building up a custom pattern, that makes the player prepared ?
00:22:555 (61,64,70) - A small recommendation: Put big notes on these three notes, this would be an added plus to the 'hey'.
00:25:722 (77,78,79,80,81) - Putting kkd k d instead of k d kkd will be more faithful to the song.
00:32:888 (128,129,130,131,132,133,134,135,136) - Actually, putting 1/1 finishers all the way through is better. Listen closely.
On all these, the streams are unfitting. I'd recommend putting 1/1 breaks as that's a "song break"
00:35:555 (141,142,143,144,145) -
00:38:222 (159,160,161,162,163) -
00:40:888 (177,178,179,180,181) -
01:44:888 (545,546,547,548,549) -
01:47:555 (563,564,565,566,567) -
01:50:222 (581,582,583,584,585) -
Then,
00:44:888 (207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223) - This stream, although a bit justified, is a bit "what". I think you started from a good idea, but couldn't do it well.
00:59:555 (278,279,280) - There, you can invert to d k d ? I mean, you've pretty much mapped the whole part to d k d k d.
01:02:222 (297) - D, instead ? K sounds a bit out of place.
01:04:888 (314) - ^ + it would make a nice d d d pattern.
01:06:888 (329,330,331,332,333,334,335,336) - Instead of this stream, I think k d k k D sounds a looot more better. (it's not English, I know.)
01:18:555 (368,369,370,371,372,373,374,375,376,377,378,379,380,381,382) - Refer to Muzukashii for this. I will give the exact thing so yeah.
01:31:555 (453,454,455,456,457,458,459,460,461) - Here, you can put 1/4s.
01:33:555 (464,465,466,467,468,469,470) - Here, you should instead put a cool-down with 1/2s
The kiai time is a bit copy-pasted between each parts, make sure you add a bit more variety !
01:54:222 (611,612,613,614,615,616,617,618,619,620,621,622,623,624,625,626,627) - Look at the first mod after "then"
The whole map is not something too bad for a beginner, but it can be improved a lot. Make sure you understand how are structured Oni maps, your diff is pretty close to an Inner.