China is among the biggest markets for most G7 countries, particularly for export-reliant economies such as Japan and Germany.
In a joint statement on Saturday, the G7 finance chiefs stressed the urgency of addressing debt vulnerabilities in low- and middle-income countries, mentioning Zambia, Ethiopia, Ghana and Sri Lanka.
"There were talks about coercion" at the G7 finance leaders' meeting, the Japanese finance ministry official said.
The G7 summit will most likely have a special session on China to debate Beijing's "economic coercion" against other countries, according to a Reuters report.
"No matter how the G7 want to fence in the Global South, it's not easy," said Atsushi Takeda, chief economist at the Itochu Economic Research Institute.