I'm curious what the numerical base the Japanese used before their
introduction to the wider western world.

I've been taught in my Japanese language classes that they move the comma to a
different place (1'0000 rather than 1,000) but that's just a question of
notation and have learned that there have been a great number of loan words in
Japanese.

I'm curious what they used before they met the Portuguese, for example, in
1543.
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question
history mathematics
What was the base for Japanese numbers?
You may wish to read [Japanese
numerals](http://en.wikipedia.org/wiki/Japanese_numerals). So 1'0000 is called
`万`, which is also used in Greek as
[myriad](http://en.wikipedia.org/wiki/Myriad).
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answer