Since population density appears to be such a big issue, I thought I would point out a few facts:
Japan's average population density:
Density 337/km² or 872.8/sq mi
A long list of select US cities and their population densities. I am sure a full list can be found elsewhere.
Union City, New Jersey 20,454/km² 52,978/mi²
West New York, New Jersey 17,124/km² 44,352/mi²
Hoboken, New Jersey 11,675/km² 30,239/mi²
New York, New York 10,173/km² 26,348/mi² Manhattan (25,550/km² or 66,173/mi²)
Somerville, Massachusetts 7,194/km² 18,633/mi² [1] [2]
Paterson, New Jersey 6,826.4/km² 17,675.4/mi²
San Francisco, California 6,349/km² 16,443/mi²
Chelsea, Massachusetts 6,211/km² 16,086/mi²
Jersey City, New Jersey 6,120/km² 15,852/mi²
Central Falls, Rhode Island 5,973/km² 15,471/mi² [3]
Chicago, Illinois 4,866/km² 12,603/mi² Edgewater (13,800/km² or 35,743/mi²)
Miami Beach, Florida 4,830/km² 12,502/mi²
Santa Ana, California 4,751/km² 12,306/mi²
Boston, Massachusetts 4,697/km² 12,166/mi² Back Bay/Beacon Hill (11,463/km² or 29,690/mi²)
Hialeah, Florida 4,544/km² 11,768/mi²
Hamtramck, Michigan 4,537/km² 11,750/mi²
Newark, New Jersey 4,459/km² 11,548/mi²
Miami, Florida 4,407/km² 11,534/mi²
Philadelphia, Pennsylvania 4,190/km² 10,852/mi²
Yonkers, New York 4,162/km² 10,780/mi²
Washington, District of Columbia 3,502/km² 9,070/mi²
Los Angeles, California 3,078/km² 7,972/mi²
Baltimore, Maryland 2,970/km² 7,693/mi²
Buffalo, New York 2,786/km² 7,217/mi²
Oakland, California 2,724/km² 7,054/mi²
Minneapolis, Minnesota 2,691/km² 6,969/mi²
Seattle, Washington 2,563/km² 6,639/mi²
New Haven, Connecticut 2,527/km² 6,554/mi² Downtown New Haven (5,633/km² or 14,590/mi²) [4]
Detroit, Michigan 2,470/km² 6,398/mi²
Cleveland, Ohio 2,353/km² 6,095/mi² Lakewood (3,895/km² or 10,088/mi²)
St. Louis, Missouri 2,199/km² 5,696/mi² University City (2,457/km² or 6,363.1/mi²)
Mechanicville, New York 2,091/km² 5,577/mi²
San Jose, California 1,953/km² 5,059/mi²
Cincinnati, Ohio 1,612/km² 4,174/mi²
Portland, Oregon 1,503/km² 3,894/mi²
Atlanta, Georgia 1,425/km² 3,690.5/mi²
Denver, Colorado 1,396.4/km² 3,642/mi²
Dallas, Texas 1,348/km² 3,492/mi² Vickery Meadows (22,354/km² or 57,897/mi²)[14]
Columbus, Ohio 1,307/km² 3,384/mi²
Houston, Texas 1,287/km² 3,333/mi²
Phoenix, Arizona 1,061/km² 2,749/mi²
So ya...can we please get fiber and FIOS now at a reasonable price in at least all of these densely populated areas? Obviously there is money to be made when you compare Japan's density.