The Chunichi Nagara Gawa Fireworks Festival is held yearly on the last Saturday of July from 7:15 p.m.-8:45 p.m. This year, the festival falls on Saturday, July 31st-this weekend! This is one of the largest fireworks displays in Japan. It is a part of the All-Japan Fireworks Competition, which I know nothing about, but it sounds cool, right? I have personally been to this festival 4 times, and it is always worth the trip. Prepare for crowds, but the selection of food and drink locations is great, and there are plenty of spots to watch from. Highly recommend!
This event is located on the banks of the Nagara River in Gifu, in between the Nagara and Kinka bridges. The event begins around 4:30 p.m, but if you want a decent spot you should show up much earlier. Like I said, this is a big festival though, so you will find a spot no matter when you come somewhere.
Special buses run from JR Gifu Station and Meitetsu Gifu Station, but the lines are long, and I usually just walk. It takes about 30 minutes, but you can follow the crowds and not get lost at all. The buses you are looking for should be pretty obvious; just look for the long line of older folks.
Hope you enjoy the show!