Owakudani is an active volcanic valley. I have heard that it was known as the Jigokudani (the Valley of Hell) by locals some time ago.
Etude House, a playful cosmetic line made in Korea, is a sure hit not only in Japan, but also worldwide. Based on the thousands of rave reviews, and tutorials on the worldwide web, Etude House is a must visit in Shinjuku. With stars, hearts and dreams throughout a dollhouse-like atmosphere, Etude House is nothing but a kawaii and sweet place to be.