Lake Biwa is a picturesque lake located Shiga Prefecture near Kyoto and is the largest lake in Japan. Lake Biwa is famous for its scenery and fishing, however its size, location and proximity to Kyoto made it a very stratigic location in the past. Lake Biwa is surrounded by several Japanese Castles and ruins of former castles including Hikone Castle which is one of the best preserved Japanese Castles. The largest city next to Lake Biwa is Otsu.