Here is a list of fireworks events which will be held in July and August in Nagano Prefecture, such as Suwa-ko Lake Firework Festival.
Nojiri-ko Lake Firework Festival (Shinano Town) … 7/29 (Sat) 19:30-, Around Nojiri-ko Lake, 2,000 fireworks
Shinshu Ueda Firework Festival (Ueda City) … 8/5 (Sat) 19:00-, 8,000 fireworks
Chikuma-gawa River Firework Festival (Chikuma City) ,,, 8/7 (Mon) 19:30-, Togura Kamiyamada Onsen, 10,000 fireworks
Susuki-gawa River Firework Festival (Matsumoto City) … 8/10 (Thu) 19:10-, Susuki-gawa River, 3,000 fireworks
Takase-gawa River Firework Festival (Ikeda Town, Matsukawa Village) … 8/13 (Sun) 19:00-, Around Takase Ohashi Bridge, 3,000 fireworks
Suwa-ko Lake Firework Festival (Suwa City) … 8/15 (Tue) 19:00-, Suwa City Lake Park at Suwa-ko Lake, 40,000 fireworks
Rokaku-ko Lake Lantern & Firework Festival (Nagano City) … 8/15 (Tue) 19:00-, Sai-gawa River Rokaku-ko Lake Shimachi-bashi Bridge, 4,000 fireworks
Iida Tokimata Lantern Festival (Iida City) … 8/16 (Wed) 19:00-, Tenryu-gawa River Tokimata Port, 2,000 fireworks
Autumn Season … Kawanakajima Kosenjo Festival (Nagano City, 3,000 fireworks) on 10/22 (Sat), Nagano Ebisu-ko Firework Festival (Nagano City, 8,000 fireworks) on 11/23 (Thu)