Played this scenario today, and the Takeda won comfortably 6-2. The Takeda lost 2 cavalry units to Oda firepower, but once across the river, the cavalry are unstoppable, and destroyed 5 Oda units and 1 leader without loss.
There are some oddities in the scenario, since the River can be crossed more easily at the flanks, and this flanks the palisades as well. The strong Oda flanking forces seem to be missing. Also missing is the Oda reserve force hidden behind the Danjo hills. The Oda outnumbered the Takeda 38,000 to 12,000. Even assuming this is the southern sector of the battle, the forces seem disproportionate.
www.samurai-archives.com/ban.html
en.wikipedia.org/wiki/Battle_of_Nagashino