The government plans to submit a bill during the upcoming extraordinary Diet session to raise the penalty a hundredfold on chartered bus business operators that fail to take safety measures after a crash that claimed 15 lives earlier this year, according to sources.

The bill would revise the law governing chartered bus businesses so the fine would be set at a maximum ¥100 million for operators that fail to abide by safety rules from the current ¥1 million.

The fine on bus operators for inadequate safety management would become equal to those on violators in the airline and railway businesses.