Thank you Guust
I want to use Paypal and Stripe in Japanese Yen.
A corrected file : geodir_payment_functions.php
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line: 855
'std' => __('USD', 'geodir_payments')
↓
'std' => __('JPY', 'geodir_payments')
line: 4473
$price = number_format ((float)$amount, 2, $decimal_sep, $thousand_sep),
↓
$price = number_format ((float)$amount, 0, $decimal_sep, $thousand_sep),
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However, the test mode of Paypal and Stripe failed.