Try this and if you have problems, PM me :-
http://maps.google.co.jp/maps?q=e-earphone&hl=ja&ll=35.699172,139.772176&spn=0.00491,0.009393&sll=37.788081,136.40625&sspn=75.268805,153.896484&brcurrent=3,0x60188c1d19d478ff:0x8738b18b0465d817,0&hq=e-earphone&t=m&z=18&iwloc=B
Photo on Google Maps is old :-
http://maps.google.co.jp/maps?q=e-earphone&hl=ja&ll=35.700562,139.771886&spn=0.00491,0.009393&sll=37.788081,136.40625&sspn=75.268805,153.896484&brcurrent=3,0x60188c1c2969d079:0xcbce389a6b190c21,0&hq=e-earphone&t=m&z=18&layer=c&cbll=35.700564,139.770859&panoid=etf_zsZI9cL79TiKtHHCvA&cbp=12,296.42,,0,-2.28
1) Entrance next to DosPara, entrance on the right
2) Even thought 5th floor says DVD4649.com, that's an old photo. As you can see Currwong's photo here, 5th floor says e-earphone (in Katakana at least) :-
http://www.flickr.com/photos/currawong1/7192143886/in/set-72157629698573214