Short for ヘボン式ローマ字綴り方 (Hebon-shiki rōmaji tsuzurikata):

convenient

a foreigner, a person from a foreign country; an alien, a foreign national / a person who is not Japanese

(nonstandard) romaji; Roman characters; the Latin alphabet, usually written in katakana and kanji: ローマ字 .

convenience

to study / to learn

writing, notation, transcription / textual representation; spelling

write, note, transcribe / be represented in text

Latin alphabet / romaji (Japanese written in the standard 26-character latin script).

Latin alphabet / romaji (Japanese written in the standard 26-character latin script).