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According to the rules of Hepburn, (http://www.halcat.com/roomazi/doc/hep3.html) しいたけ is correctly romanized as "shiitake". What is the correct romanization of イー as in シート? Should it be "shiito" or "shīto" or "shi-to"?

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By "correct", do you mean "according to the rules described by the particular version of Hepburn linked to in this question"? – snailplane Feb 13 '13 at 7:51
@snailplane The page I linked to does not say anything about イー, I don't think. – user18597 Feb 13 '13 at 7:55
Then what do you mean by "correct"? – snailplane Feb 13 '13 at 7:56
1) You link to the rules. 2) The rules do not define this case. Hence, there is no solution to the question. What am I missing? – Dono Feb 13 '13 at 7:58
@Dono - yes, there is no solution on that page. I want to find if there is a solution other than on that page. – user18597 Feb 13 '13 at 8:01

Of course it depends what romanization system you use, but Hepburn seems to romanize しいたけ as shiitake, but シート as shīto.

More generally, the 長音 "ー" is always romanized with a macron over the vowel before it. (Reference: Kenkyūsha's New Japanese-English Dictionary)

(Other systems (I stick to Wāpuro rōmaji) use si for し, whence si-to. Kunrei-shiki uses a circumflex and would romanize シート to sîto.)

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The "loanword" section of the Wikipedia article you point me to is completely unreferenced, so it could just be a speculation on the part of whoever wrote it. – user18597 Feb 13 '13 at 7:51
Do you agree that in Hepburn ローマ字 is romanized as rōmaji? – Earthliŋ Feb 13 '13 at 7:56
yes, like ろうそく is romanized as rōsoku, but this is a different case, because しいたけ is romanized as shiitake. – user18597 Feb 13 '13 at 7:59
Re: "(I stick to Wāpuro rōmaji) use si for し"; in my experience input of either "si" or "shi" will produce し. (I prefer "shi" because that is how it sounds in English.) – Tim Feb 13 '13 at 13:21
Japanese sh is halfway really between s and English sh. Shi doesn't feel closer than s to me. – user54609 Feb 14 '13 at 19:50

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