In a large liquid measuring cup, combine the ketchup, rice vinegar, brown sugar, sriracha, garlic, ginger, salt, and coriander.
Trim off any large sections of fat on the pork. Pour a little of the sauce into the bottom of the slower cooker, then put the pork on top and cover with the remaining sauce. Cook on low for 7-8 hours.
Once it’s done, roughly mince the pork and let it set in the sauce for about 10-15 minutes. Remove with a slotted spoon and either serve warm or let it cool and store.
For the tacos, serve the warm pork in tortilla shells topped with pineapple, radish, and cilantro.