我々, Justice Christopher, 華村灰太郎 & classmate Band, iGiGi, 雨宮弘哲

Take the north exit of JR Koenji station and you'll see a large open area with taxis waiting, etc. Cross and go down the shopping street on the left heading away from the station. Keep going to the end, then turn left and Penguin House is in the basement of a building on the left.