Japan One Yen 1889 (Meiji Year 22) - Authentic? Have No Experience With These

These can look so good maybe nobody could really tell by the pictures.
I have several, and the best way I can tell mine are bad is because mine are not silver.
Yours sort of hints to me as being not genuine- but maybe hard to say.
I do have one that is easy to spot when magnified, but two others not so much by eye alone.

The denticles appear questionable.

The crenulated rim is a common place for flaws & flubs among fakers.
If the denticles do not really look like as pictured, then photos can be misleading.
I like it best when I have the coin(s) in my hands (shop) so I can tell the owner what it really is or is not.

Foe what it's worth - It looks real to me based on the photos.

Looks Ok to me.
The denticles look different to other places on these coins when the toning is variable. It's easier to see the denticle shape if the magnification is higher.

I have a couple of this year, Meiji M22 and it looks the similar. This year has the "4 spines" over the flame version, which are only seen on M20 - M25 and on Taisho T3.
I have a few dozen of these 1 yen coins.

I know nothing of these, but reading the replies from Albert, a genuine example is silver, so you could try the tissue test.

I have a different view on this.
I believe it is genuine and the reason that there is some questionable detailing is that this has been repaired.
This is a completely common variety in this condition because it won't grade out at all due to the chop mark (the only official counterstrikes are the 1897 tokyo and osaka mint counterstrikes) and also due to what I believe to be engraving and repair added to remove other chop marks (hence why others are spotting deviations from the regular pattern)
This would grade out at XF details and that would make it worth say 30 bucks so not much more than the silver content.
If this is a fake (and as others said it could still be because I don't have it in hand to examine) then it is pretty much the best I have ever seen for this date and for most dates actually.
A fake of this quality would only usually be used for one of the rarest dates and if not for and 1875 or 74 at least an 1880 or something. For an 1889 it just won't be worth faking this well.
There is one last possibility - that this is a contemporary forgery of the time. However these are actually supremely rare and for an 1889 are worth far more than the genuine pieces. I don't believe this to be the case either but it is a possibility.
I would be very concerned if fakers are able to make fakes this good for a couple of bucks and for the moment I don't think so given that the weight is fine and the thickness looks okay which again implies it is probably silver and no one would fake this issue with a chopmark at this grade with real silver.