Just curious, where is your info that the private donations were made by Americans from?
"UN data shows Japan was the single biggest donor to the tsunami response, committing more than $500m and deploying more than 100 emergency workers to assist with relief efforts. Seven years later, Japan experienced its own tsunami, forcing it to swap its position as one of the world’s biggest aid donors to one of the biggest aid recipients of 2011.
Donations from individuals, businesses, trusts and foundations topped the list, accounting for half of total aid to the UN fund and making it the largest private response to any natural disaster."
The U.S is seventh in the list of donors under Japan, DEC(Uk), UNICEF, European Comission, the UK and private donors.
Disaster relief is a really significant thing but there is also the everyday poverty of people struggling in low paid jobs, with disabilities, with crippling health costs etc