A system where numbers are used to spell out Japanese words. For example, the number 39 can be read as san-kyuu, which sounds like thank you in English.
Numbers may be read as native Japanese (kun'yomi), Sino-Japanese (on'yomi), or as English, and are usually shortened to the first kana. They can also be read as though they had dakuten (゛) or handakuten (゜) added to them if necessary. E.g. the number 8 can be ya (short for yattsu), ha (short for hachi), ba (ha with dakuten) or pa (ha with handakuten).
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