Japan exported about $600 million worth of aquatic products to China in 2022, making it the biggest market for Japanese exports, with Hong Kong second. Sales to China and Hong Kong accounted for 42% of all Japanese aquatic exports in 2022, according to government data.
There were tourist trips into the exclusion zone around Pripyat (closest town to the plant) all the time until Covid. I’m guessing they haven’t restarted because of the war now, but plenty of people visited with no ill effects.
Visiting, sure. Eating products grown/harvested there seems ill advised.