Japan has a lot of 100 yen shops, but 300 yen shops are also really good and popular.
These two items are from my local 300 yen shop called Mikazuki Momoko. (www.momoko300.com/)
I'm not really into girly things since I'm more of a tomboy, but when I see all the cute stuff in there I feel all giddy.
It's an Eevee pencil case (although I use it for my makeup) and a My Little Pony FiM Notebook.