When signing up for pixiv Premium, your payment currency (JPY or USD) is automatically determined based on your access location (e.g., your IP address).
If accessing from within Japan: Japanese Yen (JPY)
If accessing from outside Japan: US Dollars (USD)
After you change your plan, the amount and currency shown at that time will be used for the next renewal.
You can check your next renewal amount and currency here.
https://www.pixiv.net/premium/edit/select
If you're in Japan but still see prices in USD or vice versa, try switching to a different internet connection (e.g., switching from Wi-Fi to mobile data) and access the page again.
If you're using ticket payments (convenience store payments, WebMoney, or BitCash), payment will be processed in JPY regardless of your location.
Please note that we cannot manually change your payment currency.