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For example, when JAXA launches a rocket, or people count the seconds to the New Year, do they use し or よん to count 4? do they use しち or なな to count 7?

Axioplase
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Louis Waweru
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  • The rocket launch was a nice idea; how about a link to a video of someone doing repetitions of an exercise? – Ned Reif Feb 02 '19 at 17:06

1 Answers1

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Usually when you count, you use よん for '4' and なな for '7'. That applies to when you count down.

じゅう きゅう はち なな ろく ご よん さん に いち

However, in some situations, pronouncing a certain sequence of numbers became so frequent end became a fixed expression. In that case, '4' and '7' may be pronounced and しち, respectively. That includes a situation of counting up:

いち に さん  ご ろく しち はち きゅう じゅう

Louis Waweru
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