Sengoku jidai resource pages have been updated.
http://hagakureproductions.tripod.com/clothes.htm http://hagakureproductions.tripod.com/hyakushou.htm I read two excellent texts which give detailed information specific to the heimin of the Hojo kokka in the 1550s:
John Whitney Hall, Nagahara Keiji, Kozo Yamamura. Japan Before Tokugawa: Political Consolidation and Economic Growth, 1500 to 1650. Princeton University Press: Princeton, 1981.
George Sansom. A History of Japan 1334-1615. Standford University Press: Stanford, 1961.