Japan is suspending its additional funding to a UN agency for Palestinian refugees in response to alleged involvement by some of its staff members in the October 7 attack by Hamas militants on Israel.
Japan isn’t a party to the ruling but it is a signatory to the genocide convention as are the other countries that have withheld funding so they have an obligation not to make the situation worse.
Even if that were true, which it isn’t, Japan isn’t a party to the ruling. They can choose to donate their own money (or not) however they want.
I suggest you read the actual ruling and dissenting opinion, they’re quite informative.
Japan isn’t a party to the ruling but it is a signatory to the genocide convention as are the other countries that have withheld funding so they have an obligation not to make the situation worse.
It’s a morally depraved act.