I've seen that one as well but it's always gone immediately.. I love most of these designs to be honest.

I finally have answers thanks to @dbooster's help. The coin turns out to be Meiji era and from 1908 instead of 1914 Taisho era.

The dealer has a high rep and I see the coins that aren't silver, are not marked as silver, so I was waiting to see if anything weird would pop up with some help while I already decided I wanted to keep the coin anyway but at least then I'd know not to buy from him again or that I can still trust him.

Dbooster already mentioned it's easy to mistake the eras if you don't understand Japanese so I can see how this was just a little error. It's one of the few dealers that constantly offer some Japanese coins so I'm going to take my chances with him again and probably all will go well then :)

Thanks for sharing your piece too, I really love all the designs from Japan so far.

!LADY