I think it's definitely a conversation long overdue. Reparations not for slavery, which was legal at the time, but certainly for the ongoing & continual theft of black wealth: e.g., how black veterans were excluded from benefitting from the GI Bill, or theft of black property in the generation that followed. Coates's essay in The Atlantic, The Case for Reparations, is a real eye-opener.

Wrt reparations to Japanese, wasn't the legal basis for that it was illegal & a violation of the 14th amendment to intern US citizens w/o cause? Those who were still citizens of Japan could certainly be interned as this was standard practice among warring nations.