My first time making a map. Critics needed since I need to improve a lot.
Definitely don't use tatami in the bathroom and kitchen. Iirc tatami is actually pretty fragile, it's not good to get it wet, and stains are hard to get out. It's also expensive in upkeep so iirc most modern japanese homes don't use them or only have one room with tatami. Also they're not really laid out like you've put them, tatami are basically 2 square mats and there are like established patterns, and not following them is bad luck.
This is of course if your floors are even supposed to be tatami.
Oh! And also, japanese bathrooms tend to be separated, like the bath gets it's own room, and the toilet's in another.
On to non japanese specific stuff.
The lack of roof/top wall tiles looks a bit weird. Though I guess that's a style choice or so the doors will work... I'd probably make a new tile for the top walls in B-E that's set to star passability.
Also if the screenshot is you're entire map, the way alot of rooms just open up into nothingness is pretty odd.
The kitchen island has the sink on top of the bottom section. Also why two stoves and sinks? I'd get rid of the bottom section of the island and probably put the entire thing in the right corner and just move the door. Then probably either make the room smaller or put a kitchen table in there.
The living room could easilly be made 3 or so tile smaller without chaning the wall decorations too much, and imo it probably should be.
The bathroom is huge, if you're not splitting it up I'd put the bathroom where the office is and vice versa. Then you could fit some bookshelves or something in the office as well. (I'm also not too sure about having a paper sliding door to the bathroom...)
Besides all that, it's a pretty goodlooking map. And a great first attempt.