I read from past threads (probably like 2011-2012) that people were really cautious about the food! Is this back to normal now? or do people in Tokyo still ask where the food source is from?
I'm wondering, as I will be eating out all the time that I'm there, is it rude if I ask them where their food source comes from?Well, to begin with, at stores, the place the food was grown has always been and still is noted (in Japanese) before 3.11 ever happened.
Secondly, I can't recall "people in Tokyo" commonly asking restaurants where food sources are coming from.
Third, as you can see from the Ministry websites, a great number of food has become safer (as the soil was cleaned and new crop was grown or a new generation of fish and cattle was grown) and the market and system are more organized now (no-notice inspections are done by both private and public organizations), so there are less to watch out for.
But just as it is in any country, even before 3.11, restaurants often boast where the source is comming from. For example, a menu might say "Boston crab." Similarly, they mention the area or prefecture of certain foods in certain menus. Otherwise, not necessarily because of 3.11, I often say things like, "Oh, this sounds very tasty. Is the fish local?" (like "local" is always nice) and the waiter might say, "Oh yes, this is a catch from so-and-so area." And then depending on that answer, I might make a second choice.
But I don't think it's really "rude" to ask. People still take it for granted that pregnant women are more concerned. But at the same time, you can also ask "indirectly" pretending you're just interested in cuisines of various regions.
Meanwhile, many people, especially older people or people without young children, prefer to choose food from Fukushima etc., to support the farmers (note again that food on the market is supposed to have been inspected and safe), so don't be surprized if you see those foods being sold/served.
On a related note, you can pick up an "I'm pregnant" badge at train stations. It will help express yourself. You can show the following illustration to the station staff to ask for the badge.
http://www.maternitymark.com/