If you're stuck with recording in that room, perhaps you could try getting something like an SE Electronics Reflexion Filter? It's like a tiny vocal booth just

If you're stuck with recording in that room, perhaps you could try getting something like an SE Electronics Reflexion Filter? It's like a tiny vocal booth just for your microphone, to block reflected sounds. http://www.seelectronics.com/reflexion-filter-x/ http://www.seelectronics.com/reflexion-filter-x/ http://www.seelectronics.com/reflexion-filter-pro/ http://www.seelectronics.com/reflexion-filter-pro/ Not sure of RRP in Japan, but someone is selling the RF-x on eBay US for $80. (I don't have one myself but I've been meaning to get one for years, didn't even know they had a home-studio model until just now.)