Akasaka Hotel Monterey might be a good choice. I admit that I've never stayed there but I've stayed at the hotel in Kobe that's run by the same company and I've always liked it there.
http://www.hotelmonterey.co.jp/cgi-b...cgi?hid=monaka
Other inexpensive hotels:
http://www.yadoplaza.com/portal/PO13...1 39.74463598