This is a T-shirt by NY designer "Marie Anne," exclusively available at the famous Hawaiian select shop "Hawaiian South Shore" in Hawaii. It is not sold in Japan. It's a popular brand secretly purchased by overseas celebrities and Japanese entertainers. Everything is handmade, so the brand produces few items and sells out quickly. The women's shirts have a slim, feminine silhouette. According to the shop staff, they recommend going a size up from your usual size! Keiko Kitagawa reportedly wears a size M! Although it is unused, please refrain from purchasing if you are sensitive to items stored at home.