Hmm, there isn't too much on the battle (available to me, anyway), but this is what I could find:

The Asai and Asakura army, eager to avenge Anegawa, marched to SW Omi in October 1570, with the Asai under Nagamasa and the Asakura under Asakura Kagetake. They had around 9,000 men under their command, whereas the Oda, whom they encountered near Sakamoto, had only a thousand. The Oda commanders, Mori Yoshinari and Oda Nobuharu, were both killed. In the immediate aftermath, Nagamasa and Kagetake made an attempt to bring down nearby Usayama Castle without succes. They therefore advanced to the district of Yamashina and set fires to the local villages. At this point, Kagetake seems to have advised that, as Kyoto was so close, they ought to just march right in. Nagamasa, however, prudently decided to wait until the main body of the army, under Asakura Yoshikage, arrived. By the time Yoshikage arrived on the scene, however, Nobunaga had already responded to the defeat at Sakamoto and was in the area with his own army. Neither side was quite willing to offer a direct battle at this point, and so the Asai/Asakura took up on Mt. Hiei. It was probably hoped that the Miyoshi and Ishiyama Honganji adherants to the west would rise to harry Nobunaga while he was distracted.
Rather then attack Mt. Hiei directly, Nobunaga looked for ways to force the Asai and Asakura to retreat. To this end, he dispatched Saki Masashisa and others to attack an Asakura supply point at Katada. The Asai/Asakura caught wind of what was going on and dispatched an army to intercept the Oda raid. 4,000 Asai and Asakura crushed an Oda force of about 1,400 - leaving, it is said, as many as 1,000 Oda dead.
As the stalemate continued, Nobunaga and Yoshikage began seeking a way out of the situation. Nobunaga in particular needed to respond to other threats, including the Nagashima ikko-ikki. Nagamasa and his men, however, were opposed to peace at this time, sensing that Nobunaga was in a tough spot.
In the event, however, Nobunaga convinced the Court and Bakufu to intercede and call for peace. Nagamasa had no choice but to obey and the Asai and Asakura retreated. The peace treaty would fold the following year.

[This message has been edited by FwSeal (edited 11-09-2000).]