Introduction to tangzhong (2018)
kingarthurflour.com
kingarthurflour.com
No Japanese anything is called "tangzhong".
The technique is called "yudane" in Japanese: https://ja.wikipedia.org/wiki/%E6%B9%AF%E7%A8%AE
That's written 湯種, where "yu" and "tane" are the Japanese native words corresponding to these character. "Tangzhong" may a romanization of a Chinese re-reading of this spelling. (For comparison, the Sino-Japanese reading ("onyomi"), if there were one, would likely be "tanshu".)
By the way, we know this is of Japanese origin because the word "tane" has meanings like "material" and "leaven dough". It's written 種, but that 種 character only has that meaning when it denotes "tane" in Japanese.
I doubt there's enough evidence to determine if it was a Japanese or Chinese invention. Either name is acceptable.
Not when the origin is mixed up. If the article said "Chinese technique of Tangzhong" or the "Japanese technique of Yudane", then its fine. The person you're replying to is talking about the mix up of the origin. No one is talking about who came first.
By the way, that is not unusual. In fact Chinese uses exonyms for Japanese names and places based on re-reading the kanji spelling in Chinese.
Let me pick something at random: 箱根, Hakone: a place name made from "hako" (box) and "ne" (root).
Checking in a Chinese dictionary, we have a hit:
https://www.mdbg.net/chinese/dictionary?page=worddict&wdrst=...
It's called Xiānggēn in Chinese.
Which, I think, also means a Japanese word in a Chinese dictionary is not an implication of acceptance as a loanword since that process is very deterministic.
Place names aren't loanwords, which is why I called them "exonyms": foreign names for places that differ from their local names. E.g. Japan is an exonym for Nihon.
In modern Shanghainese, it's roughly "Zeppen".
Japanese speakers used to do this to Chinese exonyms also, but generally don't anymore; nowadays they tend to take the characters (sometimes with the writing slightly changed) and annotate the reading (furikana) with the native pronunciation using Katakana.
From http://www.thefreshloaf.com/node/39723/my-tangzhong-roux-faq
I have no idea whether that's true, but if it did originate in Taiwan it would make the language issue make more sense.
The first Chinese-English dictionary I found with DuckDuckGo results tends to confirm my hypothesis:
https://www.mdbg.net/chinese/dictionary?page=worddict&wdrst=...
"(loanword from Japanese 湯種 yudane)"
Anyway! This idea can work will all kinds of starches because the "trick" is to trap some additional water in a gelatinized ball and spread that throughout the dough. It makes for higher total water content while not making to dough loose to produce more steam, and the starches help the gluten trap it. You can even use gelatin itself! When you make potato bread/rolls at Thanksgiving you're using the same trick but with potato starch!
I often make ciabatta with 95% hydration, of which 1/3rd comes from a water roux. Without tangzhong the dough is much sticker and harder to handle, which makes it harder to both form the loaves nicely, and to keep the large bubbles in the bread. The final product is very similar, though, but the process is easier.
The approach I take is similar to this one http://www.thefreshloaf.com/node/2984/jasons-quick-coccodril... with 30g of flour and 150g of water pre-cooked together before the dough (batter?) is kneaded.
It also helps a lot in sticky doughs. If you like spiced fruit buns around Easter time, check out King Arthur's milk bread recipe (https://www.kingarthurflour.com/recipes/japanese-milk-bread-...) and spice and fruit to taste. Best hot cross buns I've eaten.
"How to Transform Flour and Water into the Fluffiest Dinner Rolls| What's Eating Dan?" https://www.youtube.com/watch?v=x2GWOHcEBcM
He does something similar with the overnight soaker/poolish/biga recipes, which have been highly successful in improving my whole-wheat bread. Is this similar, or a different technique worth trying?
Thanks!
Tangzhong is basically about packing more moisture into a dough while keeping it easy to handle. Higher hydration doughs are very sticky and take some experience to work with, but this will let you get something that is like a 75% hydration, but still handles like a 70% hydration dough. (I just made up these numbers, but you get the point).
For my part, I am fairly experienced with handling up to 80-ish% hydration, so I never bother with tangzhong, since it just adds another thing to do and creates more dishes to wash.
So tangzhong can give you a higher hydration, but it's not necessarily the same thing as your 80-ish% hydration dough.
It's doesn't seem to have the same effect as enriched dough in making the crust soft.