I found very little on this battle, other than the approximate strengths and commanders. So this is a my best guess based on what little I could gleen from the battle.
First Battle of Konodai (Nov 1538)
Taking advantage of Hojo preoccupation with a dispute with the Imagawa, the Satomi and
Ashikaga gathered an army to attack the Hojo's Musashi outposts. Ujitsuna hastily
assembled troops from Izu and Sagami, pausing to assemble them at Edo before moving
on to Konodai. There, the Satomi and Ashikaga forces were set upon and defeated with
relative ease. Ashikaga Yoshiaki's son Motoyori was killed in battle leading his Samurai, and in grief, Yoshiaki went mad with rage. A Hõjõ archer recognised him and put an arrow into his chest. (Turnbull, Samurai Commanders (1) 976-1576; p.48)
Resulting from Ashikaga's death, the allies collapsed and the Hojo pursued the Satomi onto the Boso Peninsula.
The stage is set, the battle lines are drawn, and you are in command. The rest is history.
Hojo Samurai (Red)
Move First
Honor & Fortune 6
Satomi Samurai (Yellow)
Honor & Fortune 5
5 Banners
• 1 Victory Banner for each unit or leader eliminated.
• Each player gains 1 Victory Banner for a unit occupying Konodai at the start of their turn.
The Victory Banner is retained as long as the unit remains on Konodai.
Special Rules
• The River Tonegawa is impassable except at the shallow fords.
Samurai Archives link