Can I return what I bought?

If the cloths you bought is not used and tag is still attached, you can return within 14 days in the store you bought and receipt (and credit card slip if you paid by card)is necessary for it.
But if the close is on sale item, accessories, underwear, swimsuit, bag or shoes, they are not refundable.

・タグのついてる新品
・購入してから14日以内
→お店で返せます

・セール品、アクセサリー、下着、水着、靴、バッグ
→お店で返せません。

・持っていくもの
→写真のレシート、クレジットカードで買った場合は一緒に渡されたクレジットカード売上票

If you haven't used the items yet, you can return the items within a couple of weeks. For returning, you must bring the items with tags are not removed and the receipt to the store. If you paid with credit card, you have to bring credit card receipt too.
You can return the item that you bought at outlet store only at outlet store.
You can't return discounted items, accessories, underwears, swimsuits, shoes, bags.

You can only within 14days only if you haven’t used it yet. Don’t forget to bring this receipt to the shop and make sure there is a tag with it. But actually it depends what kinds of goods you bought.