Kaoru is an excellent host - he clearly cares about his guests and his communication is very good - his directions were particularly helpful. His place is equally good - spacious, comfortable, immaculately clean and very well-situated - the subway and Yamanote stations are within walking distance and there are plenty of amenities (a 7-Eleven and post office are across the road) and restaurants nearby. It's an excellent base, particularly for larger groups, and I'd highly recommend it to anyone visiting Tokyo.