Material：
List 分 ふん Minutes
Data
Commentary：
To count minutes in Japanese, simply add
分 (
Hiragana: ふん
Romaji: Hu-nn) after
numerals.
Kanji 分 means "a minute."
１分 (
Hiragana: いちふん
Romaji: I-chi hu-nn) means "1 minute."
２分 (
Hiragana: にふん
Romaji: Ni hu-nn) means "2 minutes."
Grammar：
Some numerals with 分 makes 音便 (
Hiragana: おんびん
Romaji: O-nn-bi-nn) = Phonetic Shift.
When native Japanese intend to speak faster, １分 is read
いっぷん (
Romaji: I-ppu-nn) instead of
いちふん (
Romaji: I-chi-fu-nn). いっぷん is a phonetic shift of いちふん.
音便 (おんびん O-nn-bi-nn) = Phonetic Shift occurs when the upper and lower teeth close.
Both いちふん (I-chi-hu-nn) and いっぷん (I-ppu-n) are acceptable in a formal speech in Japanese.
Further study：
Japan Ministry of Education (文部科学省).
学習指導要領 生きる力. 2017.
Republic of Korea Ministry of Education (대한민국
교육부).
People's Republic of China Ministry of Education (
中华人民共和国教育部). Tōngyòng Guīfàn Hànzì Biǎo (通用规范汉字表). 2013.
U.S. Department of Education (アメリカ合衆国教育省).