Taiwan:
Random shop in the Kaohsiung Arena Mall offered DCC on a contactless MC transaction. I didn't even realize until I got the receipt, which showed the checkboxes but fortunately with NTD selected, so thanks, random store clerk!

Howard Resort Xitou, no DCC at the front desk or the restaurants, which was mildly surprising only because Howard Kaohsiung was the site of the egregious DCC posted upthread.

Japan: various DCC dipping my CSR (contactless doesn't work on my card despite having the symbol) but always given control of or shown the prompts and permitted to select on my own. Didn't stop to read/figure out the percentages though.