The characters and character combinations in the romanization tables each represent one syllable (apart from nine characters in the table of small-size kana).

::::: Expanded fifty sounds table :::::

* The reading only when this kana functions as a particle
** obsolete

The above table lists, with their transcriptions into roman letters, the basic characters from the Fifty sounds table and (shaded gray) the characters with diacritical marks that are derived from them. Each cell in the table contains a hiragana on the left and the corresponding katakana on the right, and below them is their romanization in the modified Hepburn system and (after the /) the official Kunrei system of romanization. The Hepburn transcription recommended by the Japanese government can be inferred from the Official romanization rules of 1954. A ん/ン that occurs before a b, p, or m sound is often transcribed with an m, in agreement with how it is pronounced.

What keys to press to input these characters on a computer keyboard is found here.

::::: Table of small-size kana :::::

* Represented in romanization by a doubling of the consonant when used as a glottal-stop sound before a consonant sound (for example, massugu for まっすぐ), or by an apostrophe when used as a glottal stop at the end of an utterance (for example, a’ for あっ). Occurs with the reading tsu/tu only in geographical names.

The kana of the row of vowels aiueo and of the y- and w-rows occur only as the second part of a syllable written with two kana, and therefore do not have a romanization of their own.

What keys to press to input these characters on a computer keyboard is found here.

::::: Ya-yu-yo supplementary table :::::

The above supplementary table lists syllables that are written with two characters. In each case, the first character is taken from the Expanded Fifty Sounds Table, and the second character — ゃ, ゅ, or ょ — is taken from the y-row of the Table of Small-Size Kana.

What keys to press to input these characters on a computer keyboard is found here.

::::: Katakana supplementary table :::::

The Katakana Supplementary Table lists one syllable character and 138 character combinations that are used to reproduce non-Japanese words and proper names. The extra character and character combinations in this table are in addition to the traditional inventory of characters in the preceding three tables.

What keys to press to input these characters on a computer keyboard is found here.