I presume this is done because it’s easier to read at a glance than a number with a bunch of zeroes behind it, similar to how you would probably spell out “70 billion yen” rather than “70 000 000 000 yen” in English.
Ah makes a lot of sense.Thank yall for the info I don’t think I was clear on what I originally meant, but I already made myself sound silly Im still at at a early level with learning Japanese and wanikani is so far the only place ive seen the kanji numbers really shown.Some the resources at least the ones I have seen only have taught numbers with hiragana and no mention of the kanji related, but I guess the number kanji are the easier ones to learn. Yall are helpful though explaining it and giving some examples.