On November 1, local residents confirmed the run-up of salmon on the Tsuchibuchi River, a tributary of the Iwaki River that flows through the center of Hirosaki City.

The Tsuchibuchi River has a water source at Kudoujiyama and joins the Hirakawa near Naijoshi. The length is about 15 km. The Hirakawa merges with the Iwaki River and connects to the sea via Lake Jusanko, which is about 60 km north. The Tsuchibuchi River was flooded twice in the 1970s and became its current form due to sewerage development. In 2000 (Heisei 12), it was selected as one of the "100 Best Waters to Revive".

According to the website of the Ministry of Land, Infrastructure, Transport and Tourism, there was a confirmed case of salmon run-up on the Tsuchibuchi River in 1988 (Showa 63).

From 2010 (Heisei 22) to 2016 (Heisei 28), the Hirosaki Tooku Lions Club released salmon to second-year elementary school students in the city. Hidefumi Fukushi, the chairman of the group, said, "In recent years, we have not released fish due to a shortage of fry. I did not know that they were running up."

On November 1, a man in his 80s who saw a salmon running up during a walk said, "I was able to find it for the first time in a few years. Some responded that they had seen it. I thought that everyone I knew, including myself, was concerned. "

A man in his 50s who lives in the area smiled, "Three salmon were found in the Tsuchibuchi River. The old Tsuchibuchi River was so dirty that it was called the" Dobubuchi River, "so many residents of Hirosaki were surprised to find salmon." show.