This month, the Tohoku, Hokuriku, and Joetsu Shinkansen trains were suspended for long periods of time due to trouble. JR East has announced that it will install new metal fittings near the broken parts that are believed to have caused the problem to strengthen them.
This will be carried out on allShinkansen lines by the end of July. It is believed that the cause of the accident was a collision between two trains. It was revealed that more than half of the parts in question have been used for more than 30 years.