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The systems are obviously not isomorphic—Japanese kana are not entirely phonetic (they are just mostly so) and the different romanization systems choose differe

The systems are obviously not isomorphic—Japanese kana are not entirely phonetic (they are just mostly so) and the different romanization systems choose differently whether to follow orthography or phonetics more closely. > hanas* + (i)masu = hanasimasu (wrong!) I cannot wrap my head around how this line in the article could be defensible. Like, if I don’t understand how Japanese is pronounced or written, and I just rely on Hepburn, I guess pasting these fragments of Hepburn together don’t produce the right Hepburn in the end? YMMV indeed, but I think the lesson here is “this is why you don’t use Hepburn when you’re writing an article about Japanese verb conjugations”. Hepburn does make sense for somebody with zero knowledge of Japanese but it just gets in the way when you are trying to explain how Japanese works. So lesson zero is “don’t rely on Hepburn” and IMO if you are interested in pronunciation and listening you should be using audio as your primary source.

danabramov 4mo ago
I’m saying that Hepburn is isomorphic to Nihon-shiki since each is an encoding of kana. Each of them is a bijection to kana (actually that’s wrong; see EDIT below), therefore there’s a bijection between them. Obviously I’m not saying that arbitrary latin characters are isomorphic to kana, that would make zero sense. I sympathise with your point about the benefits of Nihon-shiki romanization here. It might’ve been a better choice for this article. > I cannot wrap my head around how this line in the article could be defensible I think the reader would just read the next section where I use your argument to critique my own approach? And then make up their own mind whether it’s defensible to do something in the article, to raise pros/cons for why I did it, and then to keep on with the choice. I wanted to illustrate this confusing point, and that’s how I chose to illustrate it. I think it’s confusing either way. I trust that a reader who actually wants to learn, and isn’t just being a pedant, would carry away the right set of conclusions, and would understand the isomorphism (again — see EDIT below) after those two sections. > Like, if I don’t understand how Japanese is pronounced or written, and I just rely on Hepburn, I guess pasting these fragments of Hepburn together don’t produce the right Hepburn in the end? Yeah. So that’s a learning opportunity that kana row shifting doesn’t quite follow rules you might expect from many other languages. Maybe that’s a clunky way to introduce it. I personally like this framing. As I noted somewhere else, you could imagine that I’ve chosen IPA notation instead. — EDIT: Actually wait, Hepburn is not bijective for zu and ji. I haven’t thought about that. It’s not relevant to any of the conjugations so it doesn’t break the article, but that may be a good argument that it’s not worth the effort rescuing Hepburn.
- klodolph 4mo ago
  > I think the reader would just read the next section where I use your argument to critique my own approach? And then make up their own mind whether it’s defensible to do something in the article, to raise pros/cons for why I did it, and then to keep on with the choice. I think that’s a long wait; I don’t want to rely too heavily on analogies but it is like teaching somebody arithmetic roman numerals and then explaining in a parenthetical that there are other ways to do arithmetic (but not naming them). Maybe the reader can make up their own mind—but I don’t think the pros and cons are raised in the article, or if the are raised, I couldn’t find it. I don’t want to pile on here but it sounds like you are, in this conversation, learning about why the different romanizations exist and what the pros and cons are. Or if you already knew, you are getting what they call an object lesson. (Like you noted—in Hepburn, ji and zu correspond to two different kana each.) > As I noted somewhere else, you could imagine that I’ve chosen IPA notation instead. This just resurfaces a similar problem with different symbols—if you put your IPA notation in slashes // you get phonemes, which will get you something mostly equivalent to Kunrei-shiki romanization. If you put your IPA in brackets [] then you get something sort of equivalent to Hepburn (in that it’s designed to show pronunciation). Both choices will on some level obscure a regular pattern that could be revealed with kana or romaji. Orthography is funny like that; in both Japanese and English it can show the origin of words even when the pronunciation changes. I think the other lesson here is that students will mostly learn morphophonology intuitively by absorbing examples with some light explanations of the rules, and if you overexplain the rules you end up with too much “scaffolding” which gets in the way. Like when people use mnemonics or try to memorize kanji by thinking pictorially.
  - danabramov 4mo ago
    I genuinely haven’t thought about zu/ji here (conceded!) It’s not relevant to conjugation though. In general, I find your attitude a bit condescending. This is what I wrote about my choice: > note i could also have used a different romanization that renders し as "si", つ as "tu", and ち as "ti" for this article. i decided to not because everyone else uses romaji, and once you understand this point once, you shouldn't have a difficulty doing this in your head My main mistake seems to be meaning “[Hepburn] romaji” by writing “romaji”. I was obviously aware of other systems because that is what the sentence says but I thought it’s acceptable to refer to Hepburn as just “romaji” as a sort of the default one. Maybe that’s wrong. Other than this terminology nit, I think I’ve made myself quite clear there. I genuinely don’t think it’s a big deal. Maybe I overestimate my readers’ intelligence but I don’t find this difficult to live with at all once you get it. Roman numerals is a funny parallel but it doesn’t hold very well. The difficulty of using Hepburn is O(1) shortcut: for conjugation, you only have to “remember” three special cases and they’re always applied just-in-time. It’s just substitutions — and are arguably inherent phonetically. Arithmetic with Roman numerals requires many stacked adjustments where you have to match pairs of things. And lack of orders really screws with ability to do multiplication. This just isn’t an intellectually honest comparison. Re: your last point I actually kind of agree. I’m that annoying student who likes to un-extrapolate backwards from examples to the rules, knowing which gives me a warm fuzzy feeling, after which I can go back to examples. My article is for people like me. Maybe there’s a few more of them.

danabramov 4mo ago

I’m saying that Hepburn is isomorphic to Nihon-shiki since each is an encoding of kana. Each of them is a bijection to kana (actually that’s wrong; see EDIT below), therefore there’s a bijection between them. Obviously I’m not saying that arbitrary latin characters are isomorphic to kana, that would make zero sense. I sympathise with your point about the benefits of Nihon-shiki romanization here. It might’ve been a better choice for this article. > I cannot wrap my head around how this line in the article could be defensible I think the reader would just read the next section where I use your argument to critique my own approach? And then make up their own mind whether it’s defensible to do something in the article, to raise pros/cons for why I did it, and then to keep on with the choice. I wanted to illustrate this confusing point, and that’s how I chose to illustrate it. I think it’s confusing either way. I trust that a reader who actually wants to learn, and isn’t just being a pedant, would carry away the right set of conclusions, and would understand the isomorphism (again — see EDIT below) after those two sections. > Like, if I don’t understand how Japanese is pronounced or written, and I just rely on Hepburn, I guess pasting these fragments of Hepburn together don’t produce the right Hepburn in the end? Yeah. So that’s a learning opportunity that kana row shifting doesn’t quite follow rules you might expect from many other languages. Maybe that’s a clunky way to introduce it. I personally like this framing. As I noted somewhere else, you could imagine that I’ve chosen IPA notation instead. — EDIT: Actually wait, Hepburn is not bijective for zu and ji. I haven’t thought about that. It’s not relevant to any of the conjugations so it doesn’t break the article, but that may be a good argument that it’s not worth the effort rescuing Hepburn.

klodolph 4mo ago
> I think the reader would just read the next section where I use your argument to critique my own approach? And then make up their own mind whether it’s defensible to do something in the article, to raise pros/cons for why I did it, and then to keep on with the choice. I think that’s a long wait; I don’t want to rely too heavily on analogies but it is like teaching somebody arithmetic roman numerals and then explaining in a parenthetical that there are other ways to do arithmetic (but not naming them). Maybe the reader can make up their own mind—but I don’t think the pros and cons are raised in the article, or if the are raised, I couldn’t find it. I don’t want to pile on here but it sounds like you are, in this conversation, learning about why the different romanizations exist and what the pros and cons are. Or if you already knew, you are getting what they call an object lesson. (Like you noted—in Hepburn, ji and zu correspond to two different kana each.) > As I noted somewhere else, you could imagine that I’ve chosen IPA notation instead. This just resurfaces a similar problem with different symbols—if you put your IPA notation in slashes // you get phonemes, which will get you something mostly equivalent to Kunrei-shiki romanization. If you put your IPA in brackets [] then you get something sort of equivalent to Hepburn (in that it’s designed to show pronunciation). Both choices will on some level obscure a regular pattern that could be revealed with kana or romaji. Orthography is funny like that; in both Japanese and English it can show the origin of words even when the pronunciation changes. I think the other lesson here is that students will mostly learn morphophonology intuitively by absorbing examples with some light explanations of the rules, and if you overexplain the rules you end up with too much “scaffolding” which gets in the way. Like when people use mnemonics or try to memorize kanji by thinking pictorially.
- danabramov 4mo ago
  I genuinely haven’t thought about zu/ji here (conceded!) It’s not relevant to conjugation though. In general, I find your attitude a bit condescending. This is what I wrote about my choice: > note i could also have used a different romanization that renders し as "si", つ as "tu", and ち as "ti" for this article. i decided to not because everyone else uses romaji, and once you understand this point once, you shouldn't have a difficulty doing this in your head My main mistake seems to be meaning “[Hepburn] romaji” by writing “romaji”. I was obviously aware of other systems because that is what the sentence says but I thought it’s acceptable to refer to Hepburn as just “romaji” as a sort of the default one. Maybe that’s wrong. Other than this terminology nit, I think I’ve made myself quite clear there. I genuinely don’t think it’s a big deal. Maybe I overestimate my readers’ intelligence but I don’t find this difficult to live with at all once you get it. Roman numerals is a funny parallel but it doesn’t hold very well. The difficulty of using Hepburn is O(1) shortcut: for conjugation, you only have to “remember” three special cases and they’re always applied just-in-time. It’s just substitutions — and are arguably inherent phonetically. Arithmetic with Roman numerals requires many stacked adjustments where you have to match pairs of things. And lack of orders really screws with ability to do multiplication. This just isn’t an intellectually honest comparison. Re: your last point I actually kind of agree. I’m that annoying student who likes to un-extrapolate backwards from examples to the rules, knowing which gives me a warm fuzzy feeling, after which I can go back to examples. My article is for people like me. Maybe there’s a few more of them.