The apartment is located in a very quiet residential area. It is quite big, can easily fit 7 person quite conforgably. It is a 5-10mins walk to Sangenjaya station which u can travel to shibuya in around 5 mins train ride.
There are plenty restaurants and fast food joints around sangenjaya in case you got hungry when you get back.
I need to add that Suyeon is a wonderful host, one time my 1 yr old kid got seriously ill, she takes us to a pediatrician and pharmacy while translating what the doctor and pharmacist said. Thanks again Suyeon!